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Surf Forecasts:
Katahama surfForecast / Shizuoka / Japan
48hr Weather and Surf, issued 8 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 3PM is: 0.8m 10s primary swell from a East-southeast direction and 0.2m 7s secondary swell from a South direction, 0.5m 4s secondary swell from a South-southwest direction (forecast issued at 08:00am May 20). The wind direction is predicted to be cross-shore.
| 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 41mm), heaviest during Thu afternoon. Warm (max 24°C on Wed morning, min 16°C on Fri morning). Winds increasing (calm on Wed night, fresh winds from the NE by Fri afternoon). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 5 | E 6 | E 7 | E 8 | E 8 | E 8 | E 9 | |
130 | 127 | 127 | 125 | 122 | 120 | 115 | 115 | 78 | 78 | 78 | 54 | 54 | 55 | 55 | 55 | 90 | 98 | 175 | 0 | 0 | 0 | 0 | 0 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross | cross | cross | cross-off | glassy | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | |
High Tide | 6:25AM1.53m | 8:30PM1.40m | 7:08AM1.44m | 9:27PM1.38m | 7:59AM1.32m | 10:34PM1.36m | ||||||||||||||||||
Low Tide | 1:34PM0.12m | 1:49AM0.96m | 2:22PM0.22m | 3:01AM0.98m | 3:17PM0.34m | |||||||||||||||||||
 |  | | |  |  |  | |  |  | | |  | | |  | | | | | |  |  | | |
 | 4:41 | — | — | — | — | — | — | 4:39 | — | — | — | — | — | — | — | 4:39 | — | — | — | — | — | — | — | 4:39 |
 | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — | — | 6:46 | — | — | 6:47 |
— | — | — | — | — | 2 | 2 | 2 | 2 | 2 | 4 | 5 | 7 | 4 | 1 | 2 | 6 | 2 | — | — | — | — | — | — | |
Temp °C | 20 | 22 | 24 | 24 | 22 | 22 | 22 | 21 | 21 | 22 | 22 | 21 | 22 | 22 | 21 | 21 | 17 | 16 | 17 | 17 | 17 | 17 | 16 | 16 |
21 | 22 | 23 | 23 | 23 | 25 | 26 | 24 | 24 | 24 | 21 | 19 | 23 | 21 | 21 | 23 | 15 | 12 | 13 | 13 | 12 | 12 | 11 | 11 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | S 6 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SSW 8 | SW 8 | SW 8 |
 kJ | 130 | 127 | 127 | 125 | 122 | 120 | 115 | 115 | 89 | 78 | 78 | 54 | 54 | 55 | 55 | 55 | 575 | 388 | 268 | 238 | 167 | 112 | 91 | 60 |
Swell 2 Height (m) Direction Period (s) | S 7 | S 7 | S 7 | S 7 | S 7 | SSW 7 | S 6 | S 5 | ESE 9 | — | — | — | — | — | — | ESE 10 | ESE 10 | — | ESE 10 | — | — | — | — | — |
| kJ | 1 | 1 | 1 | 4 | 3 | 15 | 13 | 19 | 78 | — | — | — | — | — | — | 54 | 54 | — | 32 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | — | — | — | — | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | 1 | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 4 | S 4 | SSW 4 | SSW 4 | S 4 | — | S 5 | S 6 | — | S 7 | SSW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 8 | E 10 | E 5 | E 6 | E 7 | E 8 | E 8 | E 8 | E 9 |
| kJ | 4 | 8 | 8 | 8 | 7 | — | 13 | 60 | — | 196 | 495 | 598 | 724 | 681 | 636 | 653 | 90 | 98 | 175 | 255 | 377 | 355 | 430 | 542 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 2 | 6 | 236 | 236 | 65 | 6 | 6 | 6 | 6 | 6 | 127 | 112 | 103 | 65 | 65 | 6 | 94 | 334 | 13 | 351 | 351 | 351 | 351 | 13 |
Best forecast wave conditions in Shizuoka | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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