Sea weather in Karatsu in Japan All the beach weather in Karatsu
All the essential weather information for enjoying the beach in Karatsu in Japan, for swimming, tanning or water sports! Our sea weather data is reliable, easy to read and updated every day.
Weather: When should you go to the beach in Karatsu over the next 7 days?
Discover the best moment to go to the beach in Karatsu in Japan this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Karatsu. You can see full forecasts by clicking on the day you want to see in the table below.
| Date | Outside temp. | Max wind | Our opinion | Details |
|---|---|---|---|---|
| Sunday 14 December 2025 | 49°F to 56°F | 21.1mph | not recommended | all the sea weather |
| Monday 15 December 2025 | 41°F to 50°F | 5.6mph | discouraged | all the sea weather |
| Tuesday 16 December 2025 | 49°F to 58°F | 3.7mph | recommended | all the sea weather |
| Wednesday 17 December 2025 | 54°F to 58°F | 16.8mph | discouraged | all the sea weather |
| Thursday 18 December 2025 | 47°F to 56°F | 2.5mph | discouraged | all the sea weather |
| Friday 19 December 2025 | 52°F to 59°F | 7.5mph | recommended | all the sea weather |
| Saturday 20 December 2025 | 58°F to 65°F | 4.4mph | recommended | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Karatsu
Sea weather on Sunday 14 December 2025
On Sunday 14 December 2025, the sun will rise at 07:16 and will set at 17:14 on the beach(es) of Karatsu. The outside temperature will be a high of 56°F t and a low of 49°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! Be careful, the sea will be generally rough with a wind speed of up to 27.3mph km/h (with gusts up to 34.2mph). Wave height will be up to 6.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  |  |  |  | | | | |
| Outside temperature | 13°C (55°F) | 12°C (53°F) | 11°C (51°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) |
| Perceived temperature | 10°C (50°F) | 8°C (47°F) | 7°C (45°F) | 6°C (43°F) | 6°C (42°F) | 6°C (43°F) | 6°C (43°F) | 6°C (43°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 84% | 63% | 59% | 58% | 65% | 59% | 57% | 58% |
| Barometric pressure | 1013 hPa | 1015 hPa | 1015 hPa | 1017 hPa | 1017 hPa | 1017 hPa | 1018 hPa | 1020 hPa |
| Cloud cover | 100% | 9% | 51% | 100% | 100% | 94% | 96% | 100% |
| Heat index | 13°C (55°F) | 12°C (53°F) | 11°C (51°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) |
| Dew point | 10°C (51°F) | 5°C (41°F) | 3°C (37°F) | 2°C (36°F) | 4°C (39°F) | 2°C (36°F) | 2°C (35°F) | 2°C (36°F) |
| Wind | ||||||||
| Speed | 44km/h (27mph) | 44km/h (27mph) | 39km/h (24mph) | 36km/h (22mph) | 38km/h (24mph) | 39km/h (24mph) | 37km/h (23mph) | 34km/h (21mph) |
| Gusts | 55km/h (34mph) | 54km/h (34mph) | 50km/h (31mph) | 43km/h (27mph) | 48km/h (30mph) | 50km/h (31mph) | 49km/h (31mph) | 43km/h (27mph) |
| Direction | 283° WNW | 299° WNW | 307° NW | 317° NW | 295° WNW | 302° WNW | 302° WNW | 309° NW |
| Wind chill | 10°C (50°F) | 8°C (47°F) | 7°C (45°F) | 6°C (43°F) | 6°C (42°F) | 6°C (43°F) | 6°C (43°F) | 6°C (43°F) |
| Waves | ||||||||
| Height | 1.5m (4.8ft) | 1.9m (6.3ft) | 1.8m (5.9ft) | 1.8m (6.0ft) | 1.9m (6.4ft) | 1.9m (6.3ft) | 1.6m (5.4ft) | 1.6m (5.2ft) |
| Direction | 269° W | 290° WNW | 302° WNW | 323° NW | 315° NW | 308° NW | 318° NW | 326° NW |
| Period | 7.4 sec. | 7.2 sec. | 6.9 sec. | 5.7 sec. | 5.8 sec. | 6.0 sec. | 5.9 sec. | 5.8 sec. |
| Significant height | 2.3m (7.5ft) | 1.8m (5.9ft) | 1.5m (4.9ft) | 1.5m (4.9ft) | 1.8m (5.9ft) | 1.5m (4.9ft) | 1.3m (4.3ft) | 1.2m (3.9ft) |
| Sea water temperature | ||||||||
| Water temperature | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) |
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 07:17 and will set at 17:14 on the beach(es) of Karatsu. The outside temperature will be a high of 50°F t and a low of 41°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 19.3mph km/h (with gusts up to 24.2mph). Wave height will be up to 5.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | |  | |  | | |
| Outside temperature | 9°C (49°F) | 9°C (49°F) | 9°C (49°F) | 9°C (49°F) | 8°C (47°F) | 7°C (44°F) | 8°C (46°F) | 9°C (48°F) |
| Perceived temperature | 6°C (42°F) | 6°C (43°F) | 6°C (43°F) | 7°C (44°F) | 6°C (43°F) | 5°C (41°F) | 7°C (44°F) | 8°C (46°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 58% | 57% | 57% | 54% | 55% | 50% | 53% | 57% |
| Barometric pressure | 1021 hPa | 1022 hPa | 1023 hPa | 1025 hPa | 1025 hPa | 1024 hPa | 1025 hPa | 1025 hPa |
| Cloud cover | 97% | 100% | 71% | 1% | 6% | 0% | 5% | 13% |
| Heat index | 9°C (49°F) | 9°C (49°F) | 9°C (49°F) | 9°C (49°F) | 8°C (47°F) | 7°C (44°F) | 8°C (46°F) | 9°C (48°F) |
| Dew point | 2°C (35°F) | 1°C (34°F) | 1°C (34°F) | 1°C (33°F) | -0°C (31°F) | -3°C (26°F) | -1°C (30°F) | 1°C (34°F) |
| Wind | ||||||||
| Speed | 31km/h (19mph) | 26km/h (16mph) | 22km/h (14mph) | 19km/h (12mph) | 14km/h (9mph) | 8km/h (5mph) | 6km/h (4mph) | 9km/h (6mph) |
| Gusts | 39km/h (24mph) | 32km/h (20mph) | 28km/h (18mph) | 23km/h (14mph) | 21km/h (13mph) | 16km/h (10mph) | 11km/h (7mph) | 14km/h (8mph) |
| Direction | 315° NW | 316° NW | 333° NNW | 335° NNW | 330° NNW | 327° NNW | 200° SSW | 195° SSW |
| Wind chill | 6°C (42°F) | 6°C (43°F) | 6°C (43°F) | 7°C (44°F) | 6°C (43°F) | 5°C (41°F) | 7°C (44°F) | 8°C (46°F) |
| Waves | ||||||||
| Height | 1.6m (5.1ft) | 1.6m (5.4ft) | 1.6m (5.3ft) | 1.5m (4.8ft) | 1.3m (4.4ft) | 1.1m (3.8ft) | 1.0m (3.3ft) | 0.9m (3.0ft) |
| Direction | 331° NNW | 336° NNW | 337° NNW | 2° N | 11° NNE | 12° NNE | 13° NNE | 14° NNE |
| Period | 6.5 sec. | 6.5 sec. | 8.7 sec. | 6.5 sec. | 9.8 sec. | 9.8 sec. | 9.5 sec. | 9.1 sec. |
| Significant height | 1.0m (3.3ft) | 1.4m (4.6ft) | 1.5m (4.9ft) | 0.8m (2.6ft) | 0.4m (1.3ft) | 0.1m (0.3ft) | 1.4m (4.6ft) | 1.3m (4.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 07:17 and will set at 17:14 on the beach(es) of Karatsu. The outside temperature will be a high of 58°F t and a low of 49°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 11.2mph km/h (with gusts up to 14.9mph). Wave height will be up to 3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 9°C (49°F) | 10°C (49°F) | 10°C (50°F) | 11°C (52°F) | 13°C (56°F) | 14°C (56°F) | 13°C (56°F) | 13°C (55°F) |
| Perceived temperature | 7°C (45°F) | 7°C (45°F) | 8°C (46°F) | 9°C (48°F) | 11°C (53°F) | 13°C (55°F) | 12°C (54°F) | 13°C (55°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 64% | 66% | 67% | 65% | 59% | 62% | 64% | 67% |
| Barometric pressure | 1024 hPa | 1024 hPa | 1024 hPa | 1024 hPa | 1023 hPa | 1022 hPa | 1023 hPa | 1023 hPa |
| Cloud cover | 15% | 20% | 28% | 94% | 72% | 98% | 90% | 68% |
| Heat index | 9°C (49°F) | 10°C (49°F) | 10°C (50°F) | 11°C (52°F) | 13°C (56°F) | 14°C (56°F) | 13°C (56°F) | 13°C (55°F) |
| Dew point | 3°C (37°F) | 4°C (38°F) | 4°C (40°F) | 5°C (41°F) | 5°C (42°F) | 6°C (43°F) | 6°C (44°F) | 7°C (45°F) |
| Wind | ||||||||
| Speed | 12km/h (7mph) | 14km/h (9mph) | 14km/h (9mph) | 15km/h (10mph) | 18km/h (11mph) | 12km/h (7mph) | 10km/h (6mph) | 6km/h (4mph) |
| Gusts | 18km/h (11mph) | 21km/h (13mph) | 22km/h (14mph) | 22km/h (14mph) | 24km/h (15mph) | 17km/h (10mph) | 15km/h (9mph) | 10km/h (6mph) |
| Direction | 199° SSW | 204° SSW | 203° SSW | 199° SSW | 217° SW | 261° W | 243° WSW | 234° SW |
| Wind chill | 7°C (45°F) | 7°C (45°F) | 8°C (46°F) | 9°C (48°F) | 11°C (53°F) | 13°C (55°F) | 12°C (54°F) | 13°C (55°F) |
| Waves | ||||||||
| Height | 0.9m (2.9ft) | 0.9m (2.9ft) | 0.8m (2.8ft) | 0.8m (2.7ft) | 0.8m (2.6ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.6m (2.0ft) |
| Direction | 16° NNE | 19° NNE | 21° NNE | 23° NNE | 24° NNE | 25° NNE | 26° NNE | 26° NNE |
| Period | 9.1 sec. | 9.2 sec. | 9.3 sec. | 9.5 sec. | 9.5 sec. | 9.4 sec. | 9.3 sec. | 9.2 sec. |
| Significant height | 1.3m (4.3ft) | 1.3m (4.3ft) | 1.3m (4.3ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.1m (3.6ft) | 0.9m (3ft) | 0.8m (2.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 07:18 and will set at 17:15 on the beach(es) of Karatsu. The outside temperature will be a high of 58°F t and a low of 54°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. The sea will be generally calm, with a wind speed of up to 16.8mph km/h (with gusts up to 24.2mph). Wave height will be up to 5.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | |  | | | | |
| Outside temperature | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 12°C (53°F) | 13°C (56°F) | 14°C (56°F) | 13°C (55°F) | 13°C (55°F) |
| Perceived temperature | 12°C (54°F) | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 12°C (54°F) | 12°C (54°F) | 11°C (52°F) | 11°C (51°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 68% | 69% | 69% | 78% | 77% | 82% | 80% | 77% |
| Barometric pressure | 1022 hPa | 1022 hPa | 1020 hPa | 1020 hPa | 1018 hPa | 1018 hPa | 1020 hPa | 1022 hPa |
| Cloud cover | 77% | 75% | 42% | 100% | 93% | 96% | 100% | 100% |
| Heat index | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 12°C (53°F) | 13°C (56°F) | 14°C (56°F) | 13°C (55°F) | 13°C (55°F) |
| Dew point | 7°C (44°F) | 7°C (45°F) | 7°C (45°F) | 8°C (47°F) | 9°C (49°F) | 10°C (51°F) | 10°C (49°F) | 9°C (48°F) |
| Wind | ||||||||
| Speed | 7km/h (4mph) | 11km/h (7mph) | 12km/h (8mph) | 10km/h (6mph) | 13km/h (8mph) | 15km/h (9mph) | 17km/h (11mph) | 27km/h (17mph) |
| Gusts | 11km/h (7mph) | 16km/h (10mph) | 18km/h (11mph) | 14km/h (9mph) | 17km/h (11mph) | 21km/h (13mph) | 25km/h (16mph) | 39km/h (24mph) |
| Direction | 185° S | 168° SSE | 143° SE | 114° ESE | 177° S | 12° NNE | 28° NNE | 24° NNE |
| Wind chill | 12°C (54°F) | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 12°C (54°F) | 12°C (54°F) | 11°C (52°F) | 11°C (51°F) |
| Waves | ||||||||
| Height | 0.6m (1.8ft) | 0.5m (1.7ft) | 0.5m (1.6ft) | 0.4m (1.4ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.5m (1.5ft) | 1.7m (5.5ft) |
| Direction | 27° NNE | 27° NNE | 26° NNE | 26° NNE | 26° NNE | 25° NNE | 26° NNE | 14° NNE |
| Period | 9.2 sec. | 9.2 sec. | 9.1 sec. | 9.1 sec. | 9.0 sec. | 8.8 sec. | 8.7 sec. | 5.6 sec. |
| Significant height | 0.6m (2ft) | 0.8m (2.6ft) | 0.8m (2.6ft) | 0.6m (2ft) | 0.6m (2ft) | 0.7m (2.3ft) | 0.9m (3ft) | 1.4m (4.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) |
Sea weather on Thursday 18 December 2025
On Thursday 18 December 2025, the sun will rise at 07:19 and will set at 17:15 on the beach(es) of Karatsu. The outside temperature will be a high of 56°F t and a low of 47°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 13.1mph km/h (with gusts up to 18mph). Wave height will be up to 4.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | |  | |
| Outside temperature | 13°C (56°F) | 12°C (54°F) | 12°C (53°F) | 12°C (54°F) | 11°C (51°F) | 10°C (50°F) | 9°C (47°F) | 12°C (53°F) |
| Perceived temperature | 11°C (52°F) | 11°C (51°F) | 10°C (51°F) | 12°C (53°F) | 10°C (50°F) | 10°C (49°F) | 9°C (47°F) | 12°C (54°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 67% | 63% | 61% | 57% | 53% | 50% | 53% | 56% |
| Barometric pressure | 1022 hPa | 1023 hPa | 1024 hPa | 1026 hPa | 1025 hPa | 1024 hPa | 1025 hPa | 1025 hPa |
| Cloud cover | 74% | 71% | 11% | 8% | 0% | 0% | 0% | 0% |
| Heat index | 13°C (56°F) | 12°C (54°F) | 12°C (53°F) | 12°C (54°F) | 11°C (51°F) | 10°C (50°F) | 9°C (47°F) | 12°C (53°F) |
| Dew point | 7°C (45°F) | 6°C (42°F) | 4°C (40°F) | 4°C (39°F) | 1°C (35°F) | 0°C (32°F) | -1°C (31°F) | 3°C (38°F) |
| Wind | ||||||||
| Speed | 21km/h (13mph) | 18km/h (11mph) | 13km/h (8mph) | 7km/h (4mph) | 7km/h (4mph) | 6km/h (4mph) | 3km/h (2mph) | 4km/h (2mph) |
| Gusts | 29km/h (18mph) | 26km/h (16mph) | 19km/h (12mph) | 10km/h (6mph) | 13km/h (8mph) | 13km/h (8mph) | 6km/h (4mph) | 6km/h (3mph) |
| Direction | 16° NNE | 22° NNE | 16° NNE | 22° NNE | 351° N | 334° NNW | 9° N | 94° E |
| Wind chill | 11°C (52°F) | 11°C (51°F) | 10°C (51°F) | 12°C (53°F) | 10°C (50°F) | 10°C (49°F) | 9°C (47°F) | 12°C (54°F) |
| Waves | ||||||||
| Height | 1.4m (4.6ft) | 1.2m (3.9ft) | 1.1m (3.7ft) | 1.2m (4.0ft) | 1.2m (3.8ft) | 1.1m (3.5ft) | 1.0m (3.2ft) | 0.8m (2.8ft) |
| Direction | 18° NNE | 20° NNE | 20° NNE | 21° NNE | 25° NNE | 25° NNE | 26° NNE | 26° NNE |
| Period | 5.8 sec. | 8.3 sec. | 8.5 sec. | 8.6 sec. | 8.4 sec. | 8.2 sec. | 7.9 sec. | 7.5 sec. |
| Significant height | 0.8m (2.6ft) | 1.3m (4.3ft) | 0.5m (1.6ft) | 0.4m (1.3ft) | 0.2m (0.7ft) | 0.3m (1ft) | 1.4m (4.6ft) | 1.2m (3.9ft) |
| Sea water temperature | ||||||||
| Water temperature | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 07:19 and will set at 17:15 on the beach(es) of Karatsu. The outside temperature will be a high of 59°F t and a low of 52°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 7.5mph km/h (with gusts up to 12.4mph). Wave height will be up to 2.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 11°C (53°F) | 11°C (52°F) | 11°C (51°F) | 12°C (53°F) | 14°C (57°F) | 14°C (57°F) | 14°C (57°F) | 15°C (58°F) |
| Perceived temperature | 11°C (52°F) | 10°C (50°F) | 9°C (49°F) | 11°C (52°F) | 14°C (58°F) | 13°C (56°F) | 13°C (56°F) | 14°C (57°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 59% | 61% | 62% | 62% | 56% | 56% | 60% | 61% |
| Barometric pressure | 1025 hPa | 1025 hPa | 1025 hPa | 1025 hPa | 1024 hPa | 1023 hPa | 1023 hPa | 1023 hPa |
| Cloud cover | 0% | 0% | 0% | 0% | 29% | 3% | 8% | 9% |
| Heat index | 11°C (53°F) | 11°C (52°F) | 11°C (51°F) | 12°C (53°F) | 14°C (57°F) | 14°C (57°F) | 14°C (57°F) | 15°C (58°F) |
| Dew point | 4°C (38°F) | 4°C (39°F) | 4°C (39°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 6°C (43°F) | 7°C (45°F) |
| Wind | ||||||||
| Speed | 6km/h (4mph) | 9km/h (5mph) | 11km/h (7mph) | 9km/h (6mph) | 4km/h (3mph) | 9km/h (5mph) | 10km/h (6mph) | 12km/h (7mph) |
| Gusts | 10km/h (6mph) | 14km/h (9mph) | 18km/h (11mph) | 13km/h (8mph) | 6km/h (4mph) | 16km/h (10mph) | 20km/h (12mph) | 20km/h (12mph) |
| Direction | 145° SE | 171° S | 187° S | 162° SSE | 116° ESE | 97° E | 110° ESE | 141° SE |
| Wind chill | 11°C (52°F) | 10°C (50°F) | 9°C (49°F) | 11°C (52°F) | 14°C (58°F) | 13°C (56°F) | 13°C (56°F) | 14°C (57°F) |
| Waves | ||||||||
| Height | 0.7m (2.4ft) | 0.6m (2.0ft) | 0.5m (1.7ft) | 0.4m (1.4ft) | 0.4m (1.2ft) | 0.3m (1.1ft) | 0.3m (1.0ft) | 0.3m (1.0ft) |
| Direction | 24° NNE | 25° NNE | 22° NNE | 24° NNE | 22° NNE | 21° NNE | 22° NNE | 21° NNE |
| Period | 7.3 sec. | 7.0 sec. | 6.8 sec. | 6.6 sec. | 6.4 sec. | 6.3 sec. | 6.1 sec. | 6.0 sec. |
| Significant height | 1.1m (3.6ft) | 0.9m (3ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.4m (1.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) |
Sea weather on Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 07:20 and will set at 17:16 on the beach(es) of Karatsu. The outside temperature will be a high of 65°F t and a low of 58°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 11.8mph km/h (with gusts up to 20.5mph). Wave height will be up to 1ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | |  | | | |
| Outside temperature | 15°C (58°F) | 14°C (58°F) | 15°C (59°F) | 16°C (60°F) | 16°C (61°F) | 18°C (64°F) | 16°C (61°F) | 16°C (61°F) |
| Perceived temperature | 13°C (56°F) | 14°C (57°F) | 15°C (59°F) | 16°C (60°F) | 16°C (61°F) | 18°C (64°F) | 16°C (61°F) | 16°C (61°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 62% | 62% | 59% | 57% | 55% | 52% | 62% | 61% |
| Barometric pressure | 1023 hPa | 1023 hPa | 1022 hPa | 1022 hPa | 1022 hPa | 1021 hPa | 1023 hPa | 1024 hPa |
| Cloud cover | 24% | 24% | 60% | 32% | 72% | 40% | 34% | 63% |
| Heat index | 15°C (58°F) | 14°C (58°F) | 15°C (59°F) | 16°C (60°F) | 16°C (61°F) | 18°C (64°F) | 16°C (61°F) | 16°C (61°F) |
| Dew point | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 9°C (48°F) | 9°C (48°F) |
| Wind | ||||||||
| Speed | 19km/h (12mph) | 10km/h (6mph) | 8km/h (5mph) | 4km/h (2mph) | 4km/h (2mph) | 1km/h (0mph) | 8km/h (5mph) | 7km/h (4mph) |
| Gusts | 33km/h (20mph) | 18km/h (11mph) | 14km/h (9mph) | 6km/h (4mph) | 6km/h (3mph) | 1km/h (1mph) | 15km/h (9mph) | 12km/h (8mph) |
| Direction | 144° SE | 176° S | 141° SE | 135° SE | 195° SSW | 77° ENE | 64° ENE | 85° E |
| Wind chill | 13°C (56°F) | 14°C (57°F) | 15°C (59°F) | 16°C (60°F) | 16°C (61°F) | 18°C (64°F) | 16°C (61°F) | 16°C (61°F) |
| Waves | ||||||||
| Height | 0.3m (1.0ft) | 0.2m (0.8ft) | 0.2m (0.7ft) | 0.2m (0.5ft) | 0.1m (0.5ft) | 0.1m (0.4ft) | 0.2m (0.6ft) | 0.2m (0.5ft) |
| Direction | 21° NNE | 23° NNE | 22° NNE | 24° NNE | 26° NNE | 26° NNE | 26° NNE | 47° NE |
| Period | 3.7 sec. | 3.9 sec. | 3.9 sec. | 3.9 sec. | 6.7 sec. | 4.0 sec. | 6.2 sec. | 6.2 sec. |
| Significant height | 0.3m (1ft) | 0.2m (0.7ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.2m (0.7ft) | 0.4m (1.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) | 19°C (65°F) |