Surf Forecasts:
Tengan surf forecast from 24 Aug 2026:
- Most powerful swell: Tuesday 25 Aug, 6PM (local time) - 11ft (3.5m), 16s period, E swell with 5,149 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 3.5m 16s and forecast to arrive on Tuesday (Aug 25) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.0m 10s period and expected on Wednesday (Aug 26) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Tue 25th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Hey there, Rusty here with the lowdown. It’s gonna be a slow burn, so don’t get your hopes up for the next week and a half. There’s a big dry spell before we get anything worth waxing up for.
The only break worth talking about is Tengan, a reef that doesn't break often but is open to the swell. Water temp is 83°F, just about normal for the season.
The first eight or nine days are mostly a bust. You get a big spike on Tuesday, August 25th – a 10ft (ESE) swell – but it’s crossed-up with a side wind, choppy as hell. Wednesday the 26th sees a 15ft (NNW) swell, but that’s paired with a gale-force offshore wind that’ll have you fighting just to get out back. Thursday, September 3rd throws a 16ft (ESE) swell into the mix, but it’s obliterated by severe gale cross-shore winds. That’s just big, dangerous, and messy.
Hold out for the real standout: Saturday afternoon, September 5th. Tengan finally lines up. We get a clean 6ft swell from the NW, an 11-second period, and a light offshore breeze from the WNW at 12 mph. The combined wave energy is 903 – a good, solid moderate push. That’s the one to circle on the calendar.
Sunday the 6th keeps things going with a 4ft NW swell and clean cross-off winds, but it’s smaller and not the main event.
Everything else is either too small, onshore, or a complete mess. Be patient, skip the early weeks, and aim for that Saturday session in September.
Rusty.
Short Range ForecastHeavy rain (total 52mm), heaviest during Wed afternoon. Warm (max 29°C on Mon afternoon, min 27°C on Mon night). Winds increasing (light winds from the E on Mon morning, gales from the NW by Tue night). | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Thu morning. Warm (max 29°C on Fri morning, min 27°C on Thu morning). Winds decreasing (strong winds from the S on Thu morning, light winds from the SE by Fri night). | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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 16 | ESE 17 | ESE 17 | ESE 16 | E 16 | E 14 | NNW 11 | NW 10 | E 13 | E 13 | E 13 | ESE 6 | SE 7 | ESE 7 | SE 8 | ESE 7 | ESE 6 | SE 8 | SE 8 | ESE 7 | ESE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 220 | 336 | 2523 | 4393 | 5135 | 2785 | 4589 | 2343 | 31 | 53 | 28 | 104 | 122 | 56 | 341 | 70 | 124 | 277 | 129 | 81 | 108 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross | cross-off | cross-off | off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on |
High Tide | 5:47PM1.78m | 4:32AM1.81m | 6:10PM1.88m | 5:13AM1.94m | 6:32PM1.97m | 5:49AM2.06m | 6:54PM2.05m | 6:24AM2.15m | 7:16PM2.11m | 6:59AM2.19m | 7:39PM2.15m | 7:35AM2.18m | 8:04PM2.16m | ||||||||
Low Tide | 10:55AM0.64m | 11:07PM1.21m | 11:31AM0.52m | 11:38PM1.07m | 12:00PM0.41m | 00:07AM0.94m | 12:28PM0.33m | 00:36AM0.80m | 12:54PM0.29m | 1:06AM0.68m | 1:22PM0.30m | 1:38AM0.57m | 1:49PM0.37m | 2:12AM0.50m | |||||||
 | |  |  | |  | | | | | | |  | | | | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — |
 | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — |
mm | 1 | 1 | — | — | 1 | 13 | 4 | 14 | 18 | 4 | 3 | 1 | — | 2 | 2 | 4 | 2 | — | — | — | — |
Temp °C | 28 | 29 | 27 | 29 | 29 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 27 |
Feels °C | 31 | 31 | 30 | 30 | 29 | 25 | 22 | 23 | 24 | 26 | 27 | 28 | 31 | 30 | 32 | 30 | 28 | 29 | 30 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 9 | ESE 14 | ESE 17 | ESE 16 | E 16 | E 14 | NNW 11 | NW 10 | W 11 | WSW 11 | SW 12 | WSW 12 | WSW 11 | SSW 10 | SW 11 | SW 11 | SW 10 | SW 10 | SW 9 | SSW 9 | S 9 |
| kJ | 122 | 236 | 2523 | 4393 | 5135 | 2785 | 4589 | 2343 | 2653 | 2822 | 3962 | 2360 | 665 | 363 | 690 | 582 | 304 | 115 | 83 | 65 | 60 |
Swell 2 Height (m) Direction Period (s) | ESE 16 | ESE 17 | SW 9 | SW 9 | SW 9 | SW 9 | E 12 | E 10 | ESE 8 | E 13 | E 13 | E 12 | SSW 10 | WSW 10 | E 14 | ENE 13 | ENE 13 | S 10 | S 10 | SW 9 | SW 10 |
| kJ | 220 | 336 | 78 | 50 | 28 | 27 | 132 | 32 | 24 | 30 | 28 | 11 | 264 | 232 | 14 | 35 | 17 | 70 | 68 | 53 | 61 |
Swell 3 Height (m) Direction Period (s) | ENE 11 | SW 9 | SW 9 | — | — | — | E 11 | E 14 | E 13 | E 13 | — | E 16 | E 12 | ESE 7 | SE 12 | E 13 | — | ENE 12 | ENE 12 | ENE 12 | ENE 11 |
| kJ | 12 | 81 | 64 | — | — | — | 209 | 16 | 31 | 53 | — | 5 | 11 | 56 | 6 | 3 | — | 30 | 28 | 14 | 13 |
Wind waves Height (m) Direction Period (s) | E 5 | E 6 | — | NNE 4 | NNE 6 | N 8 | W 9 | SW 8 | SSW 9 | S 8 | SW 12 | ESE 6 | SE 7 | — | SE 8 | ESE 7 | ESE 6 | SE 8 | SE 8 | ESE 7 | ESE 7 |
| kJ | 8 | 39 | — | 36 | 208 | 2268 | 3081 | 2608 | 1728 | 709 | 3331 | 104 | 122 | — | 341 | 70 | 124 | 277 | 129 | 81 | 108 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 13 | 13 | 37 | 621 | 621 | 621 | 621 | 631 | 631 | 692 | 647 | 13 | 13 | 13 | 28 | 990 | 13 | 732 | 13 | 12 |
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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