Surf Forecasts:
Kuminatu surf forecast from 14 Oct 2026:
- Best quality surf: Friday 16 Oct, 6AM (local time) - 3.5ft (1.0m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Thursday 15 Oct, 6AM (local time) - 6ft (1.9m), 10s period, ENE swell with 678 kJ wave energy.
- Next surfable swell (1★+): Friday 16 Oct, 6AM (local time) - 3.5ft (1.0m), 11s period with ENE swell.
Best Forecast Surf Conditions for Kuminatu this week:
The surf forecast for Kuminatu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Oct 16) at 6AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.6m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kuminatu in the next 16 days are 1.9m 10s and forecast to arrive on Thursday (Oct 15) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Thursday (Oct 15) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 16th Oct) | 3.5ft (1.0m) 11s |
| Best Surf | 6AM (Fri 16th Oct) | 3.5ft (1.0m) 11s |
| Most Powerful | 6AM (Thu 15th Oct) | 6ft (1.9m) 10s |
Table - best surf conditions forecast for Kuminatu over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 23°C on Fri afternoon, min 18°C on Wed night). Winds decreasing (fresh winds from the NE on Wed night, light winds from the ENE by Thu night). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Mon morning. Warm (max 25°C on Tue morning, min 19°C on Sat night). Winds increasing (light winds from the E on Sat night, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||
Thursday 15 | Friday 16 | Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | ENE 10 | ENE 8 | E 8 | E 10 | ENE 11 | ENE 11 | ENE 11 | ENE 6 | ENE 6 | E 7 | ESE 5 | ESE 5 | SE 5 | SSE 6 | SE 7 | SSW 6 | SE 10 | SSE 9 | SE 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 416 | 507 | 589 | 374 | 249 | 202 | 128 | 159 | 160 | 107 | 47 | 40 | 65 | 222 | 147 | 136 | 204 | 288 | 249 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-on | cross-off | cross | cross-off | cross-off | cross | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:23AM1.31m | 5:53PM1.49m | 8:11AM1.23m | 6:17PM1.43m | 9:19AM1.16m | 6:45PM1.35m | 11:17AM1.13m | 7:17PM1.26m | 1:05PM1.18m | 8:35PM1.15m | 1:40PM1.25m | 11:38PM1.12m | |||||||
Low Tide | 00:26AM0.20m | 12:21PM0.92m | 1:02AM0.26m | 12:46PM0.98m | 1:44AM0.35m | 1:14PM1.04m | 2:41AM0.45m | 2:06PM1.11m | 4:03AM0.53m | 5:15PM1.12m | 5:38AM0.55m | 7:20PM1.01m | |||||||
 |  | |  |  | |  | |  |  | | | |  |  | | | | | |
 | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — |
 | — | — | 5:05 | — | — | 5:04 | — | — | 5:01 | — | — | 5:00 | — | — | 5:00 | — | — | 4:59 | — |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 1 | — | — | — | — |
Temp °C | 22 | 19 | 19 | 20 | 22 | 23 | 21 | 20 | 20 | 20 | 21 | 22 | 23 | 24 | 24 | 24 | 25 | 25 | 25 |
Feels °C | 23 | 15 | 16 | 19 | 22 | 24 | 23 | 15 | 16 | 18 | 19 | 21 | 20 | 21 | 23 | 23 | 24 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | SE 8 | ENE 12 | WSW 6 | E 10 | ENE 11 | ENE 11 | ENE 11 | SSE 8 | ENE 10 | ENE 10 | ENE 9 | ESE 7 | SE 7 | ENE 9 | SE 7 | SE 8 | SE 10 | SSE 9 | SE 11 |
| kJ | 35 | 29 | 4 | 374 | 249 | 202 | 128 | 11 | 40 | 38 | 17 | 18 | 24 | 8 | 147 | 99 | 204 | 288 | 249 |
Swell 2 Height (m) Direction Period (s) | SW 5 | WSW 6 | — | SE 8 | SE 8 | SE 8 | SE 8 | — | SSE 7 | S 7 | SE 7 | ENE 9 | SE 10 | NE 12 | ENE 9 | E 9 | SSW 6 | NE 4 | ENE 5 |
| kJ | 13 | 4 | — | 34 | 46 | 36 | 28 | — | 5 | 4 | 13 | 8 | 15 | 5 | 8 | 6 | 52 | 3 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 6 | S 10 | SE 10 | SSE 8 | W 6 | S 12 | SE 11 | S 6 | SE 10 | ENE 11 | NE 6 | E 12 | E 12 | E 8 | E 8 | E 11 |
| kJ | — | — | — | 1 | 2 | 4 | 7 | 1 | 3 | 5 | 3 | 16 | 12 | 2 | 3 | 3 | 6 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | ENE 10 | ENE 8 | E 8 | — | — | — | — | ENE 6 | ENE 6 | E 7 | ESE 5 | ESE 5 | SE 5 | SSE 6 | SSW 6 | SSW 6 | — | SW 5 | SSW 5 |
| kJ | 416 | 507 | 589 | — | — | — | — | 159 | 160 | 107 | 47 | 40 | 65 | 222 | 135 | 136 | — | 29 | 117 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 542 | 231 | 231 | 21 | 0 | 12 | 0 | 850 | 1541 | 39 | 605 | 571 | 545 | 91 | 188 | 79 | 188 | 545 | 524 |
Best forecast wave conditions in Chiba | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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 16 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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