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Surf Forecasts:
Katahama surfForecast / Shizuoka / Japan
48hr Weather and Surf, issued 8 pm Thursday 21 May 2026 JSTForecast update in hr min s Forecast update imminent
Katahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Katahama sea temperature is
20.3° C
(Which is 1.1°C colder than average for this time of year)How big are the waves at Katahama today?
The current surf forecast for Katahama at 2AM is: 1.2m 4s primary swell from a East direction and 0.5m 10s secondary swell from a East-southeast direction (forecast issued at 08:00pm May 21). An open ocean swell of 2.0m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 3ft (0.9m) | 5s |
| Afternoon (22 May) | 3.5ft (1.1m) | 6s |
| Evening (22 May) | - | - |
Table - waves today at Katahama. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 21mm), heaviest during Thu night. Warm (max 22°C on Thu night, min 15°C on Fri night). Winds increasing (light winds from the SSW on Thu night, fresh winds from the NE by Fri night). | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
ESE 10 | ESE 10 | E 10 | ESE 10 | ESE 10 | E 5 | E 6 | E 6 | E 7 | E 8 | E 8 | E 8 | S 8 | E 7 | S 6 | E 7 | E 6 | E 6 | E 6 | ESE 6 | SE 6 | ESE 7 | E 10 | E 10 | |
55 | 55 | 149 | 58 | 54 | 45 | 64 | 83 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 342 | 301 | 295 | 243 | 205 | 78 | 206 | 305 | 305 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | on | |
High Tide | 9:27PM1.38m | 7:59AM1.32m | 10:34PM1.36m | 9:10AM1.19m | 11:45PM1.37m | 11:03AM1.10m | ||||||||||||||||||
Low Tide | 3:01AM0.98m | 3:17PM0.34m | 4:32AM0.95m | 4:21PM0.47m | 6:08AM0.87m | |||||||||||||||||||
 |  |  | |  | | | |  |  | |  | | | | | | | |  | | | |  | |
 | — | — | — | 4:39 | — | — | — | — | — | — | — | 4:39 | — | — | — | — | — | — | — | 4:39 | — | — | — | — |
 | 6:46 | — | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — | — | 6:47 | — | — | — | — | — | — | 6:49 |
— | 1 | 6 | 9 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | |
Temp °C | 22 | 22 | 19 | 17 | 17 | 17 | 18 | 19 | 18 | 16 | 15 | 15 | 15 | 15 | 16 | 17 | 18 | 18 | 18 | 17 | 17 | 19 | 21 | 21 |
23 | 25 | 19 | 15 | 14 | 14 | 16 | 16 | 13 | 10 | 9 | 10 | 10 | 10 | 11 | 13 | 15 | 14 | 14 | 14 | 14 | 16 | 19 | 19 | |
Swell 1 Height (m) Direction Period (s) | S 8 | SW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SW 8 | SSW 8 | SW 8 | SSW 7 | SW 7 | SW 7 | SSW 7 | SW 7 | SW 7 | SSW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SE 6 | SE 7 | SE 7 | SE 7 |
 kJ | 316 | 544 | 517 | 403 | 425 | 362 | 242 | 187 | 129 | 96 | 56 | 25 | 19 | 12 | 7 | 5 | 2 | 2 | 2 | 2 | 78 | 63 | 63 | 63 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | — | — | — | — | — | S 8 | — | S 6 | — | — | — | — | — | SE 12 | E 12 | — | — |
| kJ | 55 | 55 | 54 | 54 | 54 | 36 | 37 | — | — | — | — | — | 1 | — | 3 | — | — | — | — | — | 6 | 3 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 8 | — | E 10 | E 4 | ENE 5 | E 5 | E 6 | E 6 | E 7 | E 8 | E 8 | E 8 | E 9 | E 7 | E 9 | E 7 | E 6 | E 6 | E 6 | ESE 6 | E 10 | ESE 7 | E 10 | E 10 |
| kJ | 294 | — | 149 | 58 | 38 | 45 | 64 | 83 | 246 | 412 | 623 | 539 | 600 | 469 | 537 | 342 | 301 | 295 | 243 | 205 | 320 | 206 | 305 | 305 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 65 | 6 | 94 | 351 | 13 | 351 | 13 | 351 | 351 | 415 | 415 | 415 | 661 | 667 | 747 | 747 | 747 | 104 | 103 | 103 | 85 | 13 | 85 | 104 |
Best forecast wave conditions in Shizuoka | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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