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 27°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays.
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 temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Kitakyushu will be 26.3°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 6 | 24.4°C | 24.8°C | |
| JUL 7 | 24.2°C | 24.3°C | |
| JUL 8 | 24.3°C | 25.0°C | |
| JUL 9 | 24.9°C | 25.0°C | |
| JUL 10 | 25.1°C | 25.5°C | |
| JUL 11 | 25.6°C | 25.3°C | |
| JUL 12 | 25.9°C | 25.8°C | |
| JUL 13 | 26.1°C | 26.0°C | |
| JUL 14 | 26.7°C | 26.0°C | 26.7°C |
| JUL 15 | 25.8°C | 26.6°C | |
| JUL 16 | 25.5°C | 26.6°C | |
| JUL 17 | 25.5°C | 26.5°C | |
| JUL 18 | 25.5°C | 26.5°C | |
| JUL 19 | 25.3°C | 26.4°C | |
| JUL 20 | 25.5°C | 26.3°C | |
| JUL 21 | 26.0°C | 26.3°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
July 15
July 16
July 17
July 18
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.