Kitakyushu — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Kitakyushu (Japan). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Kitakyushu help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Kitakyushu in the Sea of Japan today is 31°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Kitakyushu has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Kitakyushu will be 28.7°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUL 27 | 29.7°C | 27.3°C | |
| JUL 28 | 30.2°C | 26.8°C | |
| JUL 29 | 30.6°C | 27.3°C | |
| JUL 30 | 30.2°C | 27.5°C | |
| JUL 31 | 30.0°C | 27.5°C | |
| AUG 1 | 30.0°C | 27.5°C | |
| AUG 2 | 29.5°C | 27.5°C | |
| AUG 3 | 29.5°C | 27.5°C | |
| AUG 4 | 30.5°C | 28.0°C | 30.5°C |
| AUG 5 | 27.5°C | 30.2°C | |
| AUG 6 | 27.5°C | 30.0°C | |
| AUG 7 | 27.5°C | 29.7°C | |
| AUG 8 | 27.5°C | 29.5°C | |
| AUG 9 | 27.8°C | 29.2°C | |
| AUG 10 | 27.8°C | 28.9°C | |
| AUG 11 | 27.3°C | 28.7°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Kitakyushu sits at the northeastern tip of Kyushu, where the Kanmon Straits and adjacent bays create varied coastal conditions influenced by the warm Tsushima Current. This maritime setting gives the area relatively mild seawater compared with northern Japan, with annual surface temperatures typically ranging from about 12°C to 28°C. Seasonal averages tend to be roughly 12–15°C in winter, 15–22°C in spring, 23–28°C in summer and 18–24°C in autumn, though sheltered bays often stay a few degrees warmer than exposed straits. Local currents and tidal flows around the straits can produce significant short-term variation in temperature and clarity, so conditions at a particular beach or inlet can differ from wider regional averages.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 9°C | 14°C | 16°C |
| February | 7°C | 12°C | 15°C |
| March | 7°C | 13°C | 16°C |
| April | 9°C | 14°C | 18°C |
| May | 11°C | 17°C | 20°C |
| June | 15°C | 21°C | 24°C |
| July | 19°C | 25°C | 29°C |
| August | 24°C | 28°C | 30°C |
| September | 22°C | 27°C | 29°C |
| October | 21°C | 24°C | 27°C |
| November | 15°C | 21°C | 23°C |
| December | 9°C | 17°C | 20°C |
* Click on a month to view detailed water temperature data.
Kitakyushu: Weather Forecast
August 5
August 6
August 7
Location, Beaches & Local Information
Nearby Beaches & Facilities
Shingu Beach
Fukumagyoko Seaside Park
Miyajihama Beach Resort
Tsuyazaki Beach Resort
Shiraishihama Beach Resort
Swimming Conditions
Swimming and beach recreation in Kitakyushu are most practical in the warmer months when water temperatures typically rise into the mid-20s °C, offering comfortable conditions for casual swimming, snorkeling in calmer coves and family-friendly beach days. Summer is the main season for organized swimming and seaside facilities, with coastal parks and some sandy beaches providing basic amenities and easy shore access. However, the strong tidal currents in parts of the Kanmon area make open-water swimming and long crossings less suitable, and swimmers should choose sheltered bays and supervised zones. Those planning a beach holiday will find the best swimming from late June through September, while shoulder seasons can be pleasant for seawatching and coastal walks rather than prolonged immersion.