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Kuminatu surfForecast / Chiba / Japan
12 Day Weather and Surf, issued 8 am Thursday 03 Jul 2025 JST
Best Forecast Surf Conditions for Kuminatu this week:
The surf forecast for Kuminatu over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jul 04) at 3AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.6m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kuminatu in the next 12 days are 1.8m 10s and forecast to arrive on Friday (Jul 04) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 6s period and expected on Sunday (Jul 06) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 4th Jul) | 3ft (0.9m) 11s |
| Best Surf | 12AM (Tue 8th Jul) | 4.5ft (1.4m) 11s |
| Most Powerful | 9PM (Fri 4th Jul) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Kuminatu over the next 12 days.
Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 9 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 11 | 10 | 10 | 9 | 8 | 8 | 11 | 11 | 11 | 11 | 10 | 9 | 10 | 11 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 178 | 141 | 154 | 425 | 489 | 597 | 410 | 361 | 288 | 305 | 384 | 406 | 395 | 435 | 507 | 363 | 307 | 120 | 168 | 168 | 120 | 123 | 152 | 296 | 364 | 356 | 439 | 894 | 1670 | 2138 | 2321 | 1984 | 2789 | 2545 | 2897 | 1734 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | cross | cross- off | cross | cross | cross- off | cross | cross- on | on | cross- on | on | glass | cross | cross | cross- off | cross- off | cross | cross- off | cross | cross | cross- off | cross | cross | cross- off | cross | cross | cross |
High Tide / height (m) | 10:13AM 1.05 | 10:26PM 1.29 | 12:08PM 1.01 | 11:05PM 1.27 | 2:05PM 1.05 | 11:53PM 1.26 | 3:23PM 1.14 | 12:47AM 1.26 | 4:14PM 1.21 | 1:40AM 1.28 | 4:53PM 1.28 | 2:28AM 1.32 | 5:26PM 1.33 | 3:12AM 1.36 | 5:56PM 1.37 | 3:53AM 1.41 | 6:25PM 1.41 | 4:35AM 1.44 | 6:54PM 1.43 | 5:16AM 1.46 | 7:23PM 1.44 | 6:00AM 1.45 | 7:51PM 1.43 | |||||||||||||
Low Tide / height (m) | 3:55PM 0.72 | 5:42AM 0.63 | 4:47PM 0.85 | 6:48AM 0.53 | 5:58PM 0.95 | 7:46AM 0.42 | 7:23PM 1.02 | 8:34AM 0.31 | 8:40PM 1.04 | 9:17AM 0.21 | 9:36PM 1.03 | 9:56AM 0.13 | 10:19PM 1.00 | 10:33AM 0.07 | 10:55PM 0.97 | 11:09AM 0.03 | 11:29PM 0.94 | 11:45AM 0.02 | 12:03AM 0.90 | 12:20PM 0.05 | 12:39AM 0.85 | 12:56PM 0.13 | 1:17AM 0.80 | |||||||||||||
Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||||||||||||
| Sunrise | 4:28 | - | - | 4:28 | - | - | 4:28 | - | - | 4:30 | - | - | 4:30 | - | - | 4:31 | - | - | 4:31 | - | - | 4:31 | - | - | 4:33 | - | - | 4:33 | - | - | 4:33 | - | - | 4:33 | - | - |
| Sunset | - | 6:57 | - | - | 6:57 | - | - | 6:57 | - | - | 6:55 | - | - | 6:55 | - | - | 6:55 | - | - | 6:55 | - | - | 6:54 | - | - | 6:54 | - | - | 6:54 | - | - | 6:53 | - | - | 6:53 | - |
 | |  | | |  |  |  | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 27 | 26 | 24 | 27 | 27 | 25 | 28 | 27 | 26 | 29 | 28 | 26 | 28 | 27 | 25 | 27 | 27 | 25 | 28 | 28 | 25 | 28 | 27 | 25 | 27 | 27 | 24 | 25 | 25 | 22 | 25 | 25 | 22 | 26 | 26 | 24 |
| Feels °C (?) | 28 | 27 | 26 | 28 | 28 | 27 | 31 | 31 | 31 | 30 | 29 | 31 | 30 | 29 | 28 | 30 | 29 | 29 | 31 | 31 | 29 | 30 | 29 | 28 | 28 | 28 | 26 | 25 | 25 | 23 | 25 | 24 | 23 | 26 | 26 | 26 |
Short Range Forecast: Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 28°C on Sat morning, min 24°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 29°C on Sun morning, min 24°C on Mon night). Wind will be generally light. | Days 6-9 Weather Summary Mostly dry. Warm (max 28°C on Wed morning, min 23°C on Fri night). Wind will be generally light. | Long Range Forecast: Mostly dry. Warm (max 26°C on Mon morning, min 21°C on Sat night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kuminatu surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Kuminatu Surf forecast
The above surf forecast table for Kuminatu provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Kuminatu can be found by selecting the local surf guide option on the grey menu. Our Kuminatu surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Kuminatu) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Kuminatu may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Kuminatu is 6 km (4 miles) from Katsuura. If you plan a holiday in Chiba, look for hotels and other accommodation in Katsuura. Katsuura has rooms for a wide range of budgets as well as car hire and transport links.
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