Surf Forecasts:
Nagahama surf forecast from 25 Aug 2026:
- Best quality surf: Thursday 27 Aug, 9AM (local time) - 3.5ft (1.0m), 6s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 9PM (local time) - 4.5ft (1.3m), 14s period, S swell with 694 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 9AM (local time) - 3.5ft (1.0m), 6s period with SSW swell.
Best Forecast Surf Conditions for Nagahama this week:
The surf forecast for Nagahama over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 27) at 9AM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.6m and 6s. Another secondary swell of 0.4m and 9s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Nagahama in the next 16 days are 1.3m 14s and forecast to arrive on Tuesday (Sep 01) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 10s period and expected on Tuesday (Sep 01) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Thu 27th Aug) | 3.5ft (1.0m) 6s |
| Best Surf | 9AM (Thu 27th Aug) | 3.5ft (1.0m) 6s |
| Most Powerful | 9PM (Tue 1st Sep) | 4.5ft (1.3m) 14s |
Table - best surf conditions forecast for Nagahama over the next 16 days.
Short Range ForecastHeavy rain (total 25mm), heaviest during Thu morning. Warm (max 29°C on Wed afternoon, min 24°C on Thu afternoon). Winds decreasing (fresh winds from the SW on Wed afternoon, calm by Fri night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat morning. Warm (max 26°C on Mon afternoon, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 11 | SSW 6 | S 11 | S 10 | S 9 | SSW 8 | SSW 6 | SSW 8 | SSE 11 | SSW 8 | SSW 8 | SSE 10 | SSW 7 | S 12 | SSW 11 | SSW 10 | SSW 19 | S 16 | S 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 183 | 137 | 68 | 63 | 55 | 45 | 57 | 76 | 18 | 19 | 12 | 11 | 11 | 10 | 10 | 12 | 25 | 35 | 69 | 612 | 600 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-off | off | cross-on | on | on | cross-off | off | cross-off | off | off | off | off | off | glassy | cross-on | glassy | cross-on | cross-on |
High Tide | 4:55PM1.51m | 3:51AM1.55m | 5:15PM1.54m | 4:33AM1.61m | 5:36PM1.56m | 5:12AM1.65m | 5:57PM1.57m | 5:50AM1.65m | 6:17PM1.57m | 6:28AM1.60m | 6:38PM1.57m | 7:08AM1.52m | 7:00PM1.55m | ||||||||
Low Tide | 10:02AM0.23m | 10:22PM0.87m | 10:37AM0.20m | 10:50PM0.74m | 11:09AM0.22m | 11:19PM0.63m | 11:39AM0.28m | 11:49PM0.53m | 12:08PM0.37m | 00:20AM0.46m | 12:35PM0.49m | 00:53AM0.42m | 1:00PM0.63m | 1:29AM0.41m | |||||||
 | |  |  |  |  | |  | | |  | | | |  | | |  | | |  | |
 | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — |
 | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:12 | — | — | 6:10 | — | — | 6:08 | — |
mm | — | — | 3 | 10 | 2 | 5 | 1 | — | 4 | 1 | — | 1 | 1 | — | — | — | — | — | — | — | 5 |
Temp °C | 28 | 29 | 28 | 27 | 24 | 26 | 26 | 27 | 27 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 26 | 26 | 26 | 27 | 27 |
Feels °C | 30 | 29 | 29 | 30 | 24 | 29 | 27 | 28 | 31 | 25 | 24 | 24 | 25 | 26 | 26 | 29 | 29 | 29 | 31 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 11 | S 6 | S 6 | S 10 | S 9 | SSE 10 | SSW 6 | SSW 8 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | S 7 | SSW 11 | SSW 10 | S 10 | S 16 | S 13 |
| kJ | 183 | 137 | 68 | 23 | 18 | 45 | 57 | 9 | 18 | 19 | 11 | 11 | 11 | 6 | 10 | 4 | 25 | 35 | 44 | 612 | 600 |
Swell 2 Height (m) Direction Period (s) | S 9 | SSE 9 | SSE 9 | SSE 9 | S 11 | SSE 10 | SSE 9 | SW 9 | S 8 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | S 12 | SSW 8 | SSE 10 | SSW 19 | E 10 | E 10 |
| kJ | 83 | 49 | 31 | 28 | 55 | 9 | 8 | 3 | 12 | 11 | 12 | 10 | 10 | 10 | 10 | 12 | 7 | 9 | 69 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | S 10 | SW 10 | SSE 10 | SSW 10 | SW 9 | SE 15 | SSE 10 | — | SSW 8 | E 6 | ESE 5 | — | S 12 | SSE 10 | SSE 9 | S 12 | SE 10 | SE 10 | SE 10 |
| kJ | 3 | 3 | 19 | 25 | 18 | 9 | 3 | 8 | 9 | — | 6 | 1 | 2 | — | 3 | 9 | 9 | 12 | 4 | 15 | 15 |
Wind waves Height (m) Direction Period (s) | SW 4 | SSW 5 | SSW 5 | SSW 6 | NE 3 | SSW 6 | — | SSW 8 | — | — | NE 2 | — | — | NNE 2 | — | — | — | SSW 2 | S 3 | — | — |
| kJ | 11 | 30 | 40 | 63 | 1 | 10 | — | 76 | — | — | 1 | — | — | 1 | — | — | — | 1 | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 24 | 24 | 0 | 0 | 73 | 73 | 22 | 8 | 39 | 39 | 53 | 8 | 43 | 43 | 8 | 8 | 39 | 0 | 55 | 24 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nagahama 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 Nagahama Surf forecast
The above surf forecast table for Nagahama provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nagahama can be found by selecting the local surf guide option on the grey menu. Our Nagahama 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 (Nagahama) 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 Nagahama 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.
Nagahama is 6 km (4 miles) from Miura. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Miura. Miura has rooms for a wide range of budgets as well as car hire and transport links.
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