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Surf Forecasts:
Kuminatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 am Sunday 31 May 2026 JSTForecast update in hr min s Forecast update imminent
Kuminatu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kuminatu sea temperature is
21.8° C
(Which is normal for this time of year)How big are the waves at Kuminatu today (31 May):
- Morning surf: Morning surf (31 May, local time) - 3ft (0.9m), 10s period with E swell.
- Afternoon surf: Afternoon surf (31 May, local time) - 3ft (0.9m), 10s period with ESE swell.
- Evening surf: Evening surf (31 May, local time) - 2.5ft (0.8m), 12s period with S swell.
The current surf forecast for Kuminatu at 8AM is: 0.9m 10s primary swell from a East direction and 0.5m 6s secondary swell from a South direction (forecast issued at 02:00am May 31). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | 3ft (0.9m) | 10s |
| Afternoon (31 May) | 3ft (0.9m) | 10s |
| Evening (31 May) | 2.5ft (0.8m) | 12s |
Table - waves today at Kuminatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Warm (max 23°C on Sun morning, min 19°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||||||
Sunday 31 | Monday 1 | Tuesday 2 | ||||||||||||||||||||||
12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
E 10 | E 10 | E 10 | E 10 | E 10 | ESE 10 | S 12 | S 12 | S 11 | S 11 | S 11 | S 11 | S 11 | SSW 15 | SSW 14 | S 12 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 13 | SSW 14 | SSW 13 | SW 13 | |
171 | 167 | 164 | 161 | 125 | 176 | 180 | 174 | 160 | 154 | 151 | 149 | 233 | 196 | 183 | 224 | 303 | 298 | 203 | 220 | 465 | 486 | 465 | 394 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | glassy | glassy | on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | |
High Tide | 3:25AM1.35m | 5:46PM1.28m | 3:56AM1.35m | 6:25PM1.28m | 4:28AM1.35m | 7:03PM1.26m | ||||||||||||||||||
Low Tide | 10:09PM0.85m | 10:33AM0.04m | 10:45PM0.87m | 11:07AM0.02m | 11:20PM0.88m | 11:42AM0.02m | ||||||||||||||||||
 |  |  | | | |  |  | | |  | | | | | | | | | | | | | | |
 | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — | — | 6:47 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 21 | 21 | 20 | 22 | 23 | 23 | 22 | 20 | 19 | 19 | 19 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 21 | 22 | 21 | 22 | 21 | 21 |
22 | 21 | 21 | 24 | 24 | 23 | 22 | 16 | 16 | 18 | 18 | 22 | 21 | 21 | 20 | 19 | 19 | 19 | 21 | 20 | 19 | 21 | 19 | 20 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 10 | ESE 10 | S 12 | S 11 | S 11 | S 11 | S 11 | E 10 | S 10 | S 10 | S 12 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 13 | SSW 14 | SSW 13 | SW 13 |
 kJ | 171 | 167 | 164 | 161 | 125 | 176 | 167 | 174 | 160 | 154 | 151 | 149 | 90 | 174 | 128 | 224 | 303 | 298 | 203 | 206 | 465 | 486 | 465 | 394 |
Swell 2 Height (m) Direction Period (s) | SSE 6 | SSE 6 | SSE 6 | S 6 | S 13 | S 12 | S 12 | E 10 | E 10 | E 10 | E 10 | E 10 | SSW 16 | E 10 | E 10 | E 10 | E 10 | E 10 | SW 14 | SW 15 | E 10 | E 9 | E 9 | E 9 |
| kJ | 32 | 26 | 25 | 15 | 92 | 72 | 180 | 125 | 125 | 94 | 94 | 92 | 99 | 90 | 89 | 90 | 89 | 65 | 191 | 220 | 64 | 62 | 61 | 60 |
Swell 3 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 6 | S 14 | SSE 6 | SSW 14 | SSW 14 | SE 12 | SSE 12 | SE 11 | SE 12 | SSW 16 | SE 11 | SSW 15 | SSW 14 | SSW 14 | SW 16 | SW 16 | E 10 | E 10 | SE 12 | SE 11 | SE 11 | SE 11 |
| kJ | 7 | 7 | 7 | 33 | 10 | 69 | 39 | 23 | 15 | 20 | 23 | 102 | 20 | 196 | 183 | 168 | 129 | 124 | 64 | 64 | 21 | 20 | 20 | 20 |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 7 | SW 4 | — | — | SW 6 | SW 6 | SSW 5 | SSW 6 | SSW 6 | S 6 | SSW 5 | S 11 | SW 4 | SW 5 | — | S 3 | S 4 | S 4 | SSE 4 | SSE 4 | SSE 5 | S 5 | SSE 5 |
| kJ | 37 | 36 | 4 | — | — | 14 | 2 | 95 | 132 | 89 | 64 | 36 | 233 | 9 | 3 | — | 5 | 6 | 7 | 13 | 25 | 41 | 51 | 69 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 21 | 21 | 5 | 0 | 0 | 21 | 21 | 571 | 91 | 75 | 77 | 21 | 21 | 27 | 131 | 91 | 91 | 91 | 79 | 21 | 21 | 21 | 21 | 21 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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