Surf Forecasts:
Tengan surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3PM (local time) - 13ft (4.0m), 11s period, NNW swell with offshore winds.
- Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 8ft (2.5m), 17s period, E swell with 4,123 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 6PM (local time) - 7ft (2.2m), 14s period with E swell.
Best Forecast Surf Conditions for Tengan this week:
The surf forecast for Tengan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 6PM. The primary swell is predicted to be 2.2m and 14s period with a secondary swell of 1.9m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Tengan in the next 16 days are 2.5m 17s and forecast to arrive on Tuesday (Aug 25) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 8s period and expected on Wednesday (Aug 26) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 25th Aug) | 7ft (2.2m) 14s |
| Best Surf | 3PM (Wed 26th Aug) | 13ft (4.0m) 11s |
| Most Powerful | 9AM (Tue 25th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the table for Tengan over the next couple of weeks.
It's a proper slow start, I'm not gonna lie. The first few days are a write-off with messy, lumpy conditions and hardly any swell to speak of. We're looking at a gap of about four days before anything even gets close to worth paddling out for. From Friday the 21st right through to Monday the 24th, it's mostly cross-shore and onshore winds with tiny, weak waves – the combined energy is barely a whisper (15 to 20), so don't even bother.
Now, things start to get interesting on Tuesday the 25th. The swell finally kicks in, but it's a 8ft beast from the east with a very long period of 17 seconds. That's a lot of water moving, and the combined energy is massive (4226). The wind is cross-on so it's still a bit messy, and honestly, for a reef break, that long-period groundswell might be a bit too straight and tricky. It's marginal, and really only for the experienced crew who know the lineup.
The standout window is Wednesday the 26th of August. This is the one. We're talking a 12ft to 13ft swell from the north and NNW, with a solid period of 12 to 11 seconds. The wind swings offshore from the west, a clean 12 mph breeze. This is the kind of day that makes the wait worthwhile. The combined energy is through the roof (3006 to 4114), but the conditions are "excellent" for those who can handle it. This is big, powerful surf – definitely in the expert-only zone. If you're a beginner, stay on the beach and watch the show. The water is a balmy 84°, which is pretty much average for this time of year.
Thursday the 27th still offers some decent leftover swell, dropping to 6ft to 7ft from the northwest, with clean offshore winds in the morning. It's a good option for the slightly less heroic among us, but the energy is dropping fast (616). After that, it's a long, slow fade into the abyss. From Friday the 28th all the way through to the end of the forecast on the 5th of September, the swell gets tiny again, the wind turns cross or onshore, and the scores are just flat. There's a few days with clean conditions but no power, and then it's back to lumpy, choppy junk. The last week is a quiet one, with nothing to get excited about.
So, to sum it up: sit tight for the first half of the week, then be ready for a powerful, clean Wednesday. After that, the window closes.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Fri morning. Warm (max 28°C on Sat morning, min 26°C on Fri morning). Winds decreasing (strong winds from the SSE on Fri night, moderate winds from the ESE by Sun night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon morning. Warm (max 29°C on Tue morning, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | ESE 10 | ESE 10 | E 14 | ENE 9 | SE 6 | ESE 10 | ESE 5 | ESE 5 | ESE 5 | ESE 17 | ESE 17 | E 17 | E 17 | E 15 | ENE 14 | N 12 | NNW 11 | NW 10 | NW 9 | NW 10 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 11 | 10 | 4 | 16 | 115 | 10 | 61 | 64 | 45 | 313 | 1312 | 2968 | 4123 | 2831 | 975 | 2873 | 4032 | 2768 | 551 | 742 | 41 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross | cross-off | off | off | cross-off | off | off | off |
High Tide | 2:22PM1.43m | 11:51PM1.67m | 4:38PM1.54m | 1:49AM1.61m | 5:20PM1.67m | 3:33AM1.68m | 5:47PM1.78m | 4:32AM1.81m | 6:10PM1.88m | 5:13AM1.94m | 6:32PM1.97m | 5:49AM2.06m | 6:54PM2.05m | ||||||||
Low Tide | 5:48PM1.37m | 8:31AM0.85m | 8:45PM1.43m | 10:03AM0.76m | 10:24PM1.33m | 10:55AM0.64m | 11:07PM1.21m | 11:31AM0.52m | 11:38PM1.07m | 12:00PM0.41m | 00:07AM0.94m | 12:28PM0.33m | 00:36AM0.80m | ||||||||
 | |  | | |  |  | | | |  |  |  | | | | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — |
mm | 3 | 4 | 1 | 2 | 2 | — | — | — | — | 1 | — | — | — | 2 | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 27 | 26 | 25 | 27 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 32 | 32 | 31 | 31 | 31 | 31 | 32 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 10 | SW 10 | S 9 | S 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | ESE 17 | E 17 | E 17 | E 15 | ENE 14 | N 12 | NNW 11 | NW 10 | NW 9 | NW 10 | WNW 10 |
| kJ | 57 | 109 | 33 | 260 | 181 | 808 | 305 | 312 | 363 | 331 | 1312 | 2968 | 4123 | 2831 | 975 | 2873 | 4032 | 2768 | 551 | 742 | 1974 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SW 10 | E 14 | ENE 9 | SW 10 | E 16 | ESE 14 | ESE 13 | ESE 12 | ESE 17 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | E 11 | E 13 | E 11 | E 10 | ESE 10 | E 9 |
| kJ | 4 | 26 | 4 | 16 | 222 | 5 | 20 | 35 | 30 | 313 | 258 | 181 | 73 | 78 | 154 | 116 | 82 | 20 | 51 | 31 | 41 |
Swell 3 Height (m) Direction Period (s) | ESE 10 | ESE 10 | — | E 14 | E 9 | — | ESE 14 | E 14 | ESE 15 | ESE 13 | — | NE 10 | — | — | SE 10 | SE 10 | SSE 8 | E 13 | E 13 | E 13 | E 12 |
| kJ | 11 | 10 | — | 4 | 2 | — | 41 | 4 | 22 | 67 | — | 23 | — | — | 4 | 17 | 13 | 14 | 14 | 13 | 12 |
Wind waves Height (m) Direction Period (s) | SSE 7 | S 7 | SSE 8 | SSE 9 | SE 6 | ESE 10 | ESE 5 | ESE 5 | ESE 5 | E 5 | E 5 | E 7 | NNE 5 | N 6 | N 8 | WNW 8 | W 9 | SSW 9 | W 8 | WSW 8 | SSW 10 |
| kJ | 206 | 200 | 782 | 729 | 115 | 10 | 61 | 64 | 45 | 47 | 77 | 110 | 103 | 200 | 858 | 1020 | 1667 | 55 | 836 | 915 | 36 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 647 | 613 | 613 | 636 | 613 | 13 | 621 | 635 | 13 | 13 | 13 | 12 | 12 | 25 | 0 | 0 | 0 | 11 | 0 | 0 | 11 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Tengan Surf forecast
The above surf forecast table for Tengan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tengan can be found by selecting the local surf guide option on the grey menu. Our Tengan 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 (Tengan) 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 Tengan 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.
Tengan is 5 km (3 miles) from the city of Ishikawa. If you plan a holiday in Okinawa, look for hotels and other accommodation in Ishikawa. Ishikawa has rooms for a wide range of budgets as well as car hire and transport links.
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