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Surf Forecasts:
Katahama surfForecast / Shizuoka / Japan
48hr Weather and Surf, issued 2 am Wednesday 20 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
20.0° C
(Which is 1.2°C colder than average for this time of year)How big are the waves at Katahama today?
The current surf forecast for Katahama at 7AM is: 0.8m 10s primary swell from a East-southeast direction and 0.1m 7s secondary swell from a South direction, 0.4m 4s secondary swell from a South-southwest direction (forecast issued at 02:00am May 20). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 2.5ft (0.8m) | 10s |
| Afternoon (20 May) | 2.5ft (0.8m) | 10s |
| Evening (20 May) | 2.5ft (0.8m) | 10s |
Table - waves today at Katahama. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 44mm), heaviest during Thu afternoon. Warm (max 24°C on Wed morning, min 15°C on Fri night). Winds increasing (calm on Wed night, fresh winds from the SW by Thu afternoon). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SE 11 | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | ENE 5 | E 6 | E 7 | S 7 | S 7 | |
117 | 98 | 130 | 127 | 127 | 125 | 122 | 120 | 115 | 115 | 80 | 80 | 80 | 83 | 54 | 54 | 55 | 55 | 92 | 109 | 149 | 0 | 24 | 23 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | glassy | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross-on | cross | cross | cross | cross | cross | cross | |
High Tide | 6:25AM1.53m | 8:30PM1.40m | 7:08AM1.44m | 9:27PM1.38m | 7:59AM1.32m | |||||||||||||||||||
Low Tide | 00:54AM0.93m | 1:34PM0.12m | 1:49AM0.96m | 2:22PM0.22m | 3:01AM0.98m | 3:17PM0.34m | ||||||||||||||||||
 |  |  |  | | |  |  |  | |  | | | |  | | |  | | | | | |  | |
 | — | 4:41 | — | — | — | — | — | — | — | 4:39 | — | — | — | — | — | — | — | 4:39 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — | — | 6:46 | — |
— | — | — | — | — | — | — | 1 | 2 | 1 | 2 | 2 | 3 | 5 | 10 | 3 | 2 | 3 | 6 | 2 | 1 | 1 | — | — | |
Temp °C | 21 | 20 | 20 | 22 | 24 | 24 | 22 | 22 | 22 | 22 | 21 | 23 | 23 | 22 | 22 | 22 | 22 | 21 | 17 | 16 | 16 | 17 | 17 | 16 |
22 | 21 | 21 | 22 | 23 | 23 | 22 | 25 | 25 | 25 | 24 | 24 | 22 | 21 | 20 | 21 | 22 | 24 | 14 | 12 | 11 | 12 | 12 | 10 | |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | S 6 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 |
 kJ | 117 | 98 | 130 | 127 | 127 | 125 | 122 | 120 | 115 | 115 | 122 | 80 | 80 | 83 | 54 | 54 | 55 | 594 | 477 | 335 | 236 | 159 | 129 | 64 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | S 7 | S 7 | S 7 | S 7 | S 7 | SSW 7 | S 6 | S 5 | ESE 10 | — | — | — | — | — | — | ESE 10 | ESE 10 | ESE 10 | ESE 10 | — | S 7 | S 7 |
| kJ | 48 | 54 | 1 | 1 | 1 | 4 | 1 | 15 | 13 | 18 | 80 | — | — | — | — | — | — | 55 | 54 | 37 | 36 | — | 24 | 23 |
Swell 3 Height (m) Direction Period (s) | — | — | S 8 | S 8 | S 8 | — | S 8 | S 6 | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | 1 | 1 | — | 1 | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 3 | SW 3 | SSW 4 | S 4 | SSW 4 | SSW 4 | SSW 4 | WSW 3 | S 4 | — | — | S 6 | SSW 7 | SW 7 | SW 8 | SW 8 | SW 8 | — | E 10 | ENE 5 | E 6 | E 7 | E 8 | E 8 |
| kJ | 1 | 2 | 4 | 8 | 8 | 7 | 5 | 1 | 7 | — | — | 188 | 472 | 623 | 724 | 795 | 728 | — | 92 | 109 | 149 | 371 | 371 | 488 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 6 | 2 | 2 | 236 | 236 | 236 | 65 | 6 | 6 | 2 | 2 | 260 | 260 | 127 | 103 | 178 | 65 | 6 | 334 | 334 | 369 | 351 | 352 | 415 |
Best forecast wave conditions in Shizuoka | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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