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Katahama surfForecast / Shizuoka / Japan
12 Day Weather and Surf, issued 2 pm Monday 19 May 2025 JST
Best Forecast Surf Conditions for Katahama this week:
The surf forecast for Katahama over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (May 20) at 9AM. The primary swell is predicted to be 4ft and 6s period with a secondary swell of 1ft and 8s. Another secondary swell of 1ft and 10s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Katahama in the next 12 days are 6ft 8s and forecast to arrive on Sunday (May 25) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 8ft 8s period and expected on Sunday (May 25) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Tue 20th May) | 4.5ft (1.3m) 6s |
| Best Surf | 9AM (Sun 25th May) | 5ft (1.5m) 8s |
| Most Powerful | 3AM (Sun 25th May) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Katahama over the next 12 days.
Mon 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | Sat 31 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (ft) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 11 | 6 | 6 | 6 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 7 | 8 | 7 | 6 | 8 | 8 | 8 | 8 | 10 | 10 | 9 | 9 | 9 | 5 | 6 | 6 | 7 | 8 | 8 | 8 | 9 | 6 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 24 | 27 | 116 | 120 | 56 | 65 | 67 | 64 | 64 | 55 | 56 | 58 | 193 | 96 | 199 | 0 | 0 | 304 | 133 | 91 | 66 | 70 | 64 | 48 | 30 | 42 | 85 | 69 | 78 | 88 | 89 | 64 | 270 | 285 | 577 | 650 |
Wind (mph) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | cross- off | cross | cross- off | glass | cross | cross- off | cross- on | cross | cross- off | cross | cross- on | cross | cross | cross | cross | cross- off | cross- off | cross | cross | on | cross | cross | cross- on | cross | cross | cross- on | glass | glass | cross- on | glass | on | cross- on | cross | cross |
High Tide / height (ft) | 12:10AM 4.43 | 11:16AM 3.58 | 1:10AM 4.56 | 1:18PM 3.64 | 1:55AM 4.69 | 2:36PM 3.94 | 2:30AM 4.79 | 3:31PM 4.2 | 3:00AM 4.89 | 4:16PM 4.43 | 3:28AM 4.99 | 4:55PM 4.59 | 3:54AM 5.12 | 5:31PM 4.69 | 4:21AM 5.22 | 6:06PM 4.76 | 4:51AM 5.28 | 6:43PM 4.79 | 5:25AM 5.28 | 7:22PM 4.79 | 6:02AM 5.15 | 8:06PM 4.76 | 6:44AM 4.92 | |||||||||||||
Low Tide / height (ft) | 4:35PM 1.51 | 6:29AM 2.92 | 5:52PM 1.87 | 7:45AM 2.46 | 7:07PM 2.1 | 8:37AM 1.97 | 8:10PM 2.3 | 9:17AM 1.51 | 9:00PM 2.49 | 9:51AM 1.12 | 9:41PM 2.66 | 10:22AM 0.79 | 10:14PM 2.82 | 10:51AM 0.49 | 10:45PM 2.95 | 11:22AM 0.3 | 11:16PM 3.02 | 11:55AM 0.2 | 11:51PM 3.08 | 12:31PM 0.2 | 12:33AM 3.15 | 1:10PM 0.33 | 1:23AM 3.18 | |||||||||||||
Mon 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | Sat 31 | ||||||||||||||||||||||||
| Sunrise | - | - | 4:41 | - | - | 4:39 | - | - | 4:39 | - | - | 4:39 | - | - | 4:39 | - | - | 4:37 | - | - | 4:37 | - | - | 4:37 | - | - | 4:37 | - | - | 4:35 | - | - | 4:35 | - | - | 4:35 |
| Sunset | 6:45 | - | - | 6:45 | - | - | 6:46 | - | - | 6:46 | - | - | 6:47 | - | - | 6:49 | - | - | 6:49 | - | - | 6:50 | - | - | 6:51 | - | - | 6:51 | - | - | 6:52 | - | - | 6:52 | - | - |
 |  |  | | |  | |  | | | |  | | | | |  |  | |  | | | | | | | | | | | | | | | | | |
Rain (in) | - | - | - | - | - | - | - | - | - | - | - | 0.0 | - | - | - | 0.0 | 0.8 | 1.3 | 0.1 | 0.1 | - | - | - | - | - | - | - | - | - | - | - | - | 0.0 | 0.1 | 1.2 | 2.4 |
| Temp. °F | 75 | 68 | 75 | 75 | 72 | 73 | 73 | 72 | 75 | 75 | 72 | 64 | 63 | 63 | 64 | 64 | 61 | 64 | 63 | 61 | 64 | 66 | 64 | 68 | 70 | 66 | 68 | 68 | 66 | 68 | 70 | 68 | 64 | 63 | 63 | 66 |
| Feels °F (?) | 72 | 70 | 72 | 68 | 72 | 77 | 73 | 75 | 77 | 73 | 73 | 63 | 59 | 59 | 55 | 57 | 52 | 63 | 61 | 57 | 66 | 64 | 61 | 63 | 66 | 63 | 66 | 66 | 66 | 66 | 68 | 70 | 63 | 61 | 59 | 70 |
Short Range Forecast: Mostly dry. Warm (max 75°F on Mon afternoon, min 68°F on Mon night). Winds decreasing (fresh winds from the SW on Tue afternoon, calm by Wed morning). | Days 3-6 Weather Summary Heavy rain (total 2.2in), heaviest during Sun morning. Warm (max 75°F on Thu afternoon, min 61°F on Sat night). Winds increasing (calm on Thu night, fresh winds from the NE by Sat night). | Days 6-9 Weather Summary Light rain (total 0.2in), mostly falling on Sun afternoon. Warm (max 70°F on Tue afternoon, min 61°F on Sun night). Wind will be generally light. | Long Range Forecast: Heavy rain (total 4.5in), heaviest during Sat morning. Warm (max 72°F on Sat afternoon, min 63°F on Fri afternoon). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Katahama 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 Katahama Surf forecast
The above surf forecast table for Katahama provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Katahama can be found by selecting the local surf guide option on the grey menu. Our Katahama 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 (Katahama) 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 Katahama 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.
Katahama is 4 km (2 miles) from the city of Sagara. If you plan a holiday in Shizuoka, look for hotels and other accommodation in Sagara. Sagara has rooms for a wide range of budgets as well as car hire and transport links.
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