Surf Forecasts:
Tengan surf forecast from 23 Aug 2026:
- Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 11ft (3.5m), 16s period, E swell with 5,658 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 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 9s period and expected on Wednesday (Aug 26) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Tue 25th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
G'day, Rusty here.
Alright, let’s be straight with you—this forecast for Tengan is a tough one. We’re looking at a long stretch of nothing special before a couple of late dates that might just save the run. The first good surf doesn’t show up until Saturday, 5th September, so we’ve got a solid gap of over a week of poor conditions to get through before anything worth paddling out for. The water temp is about average for the time of year, so no shock there.
The whole first week is a write-off. Monday the 24th through to Friday the 5th September is all poor surf, with howling onshore winds, lumpy chop, and storm risks. Tuesday the 25th has a big 10ft swell from the ESE, but it’s cross-shore and messy with a 25 mph wind, making it a total mess. Wednesday the 26th sees 10ft to 12ft swells, but with near gale-force winds, it’s blown out and ugly—maybe more interesting for kite surfing than paddle surfing. The combined swell energy is high (2409 to 5621), but the quality is just not there. The rest of the week is tiny, onshore junk.
Now, for the good stuff. The standout window is Saturday, 5th September morning. Tengan (reef break) is the only spot to talk about, and it’s a true little gem. The morning sees a 3ft SE swell with a 16-second period (very long groundswell), and combined energy of 331 (moderate). The wind is light cross-offshore from the WNW at 3 mph, so it’ll be clean. This is a beginner-friendly reef break, but it’s listed as ‘inconsistent,’ so the sets might be spaced out. The afternoon glass off is even better—4ft SE swell, 15-second period, and glassy conditions. That’s the pick of the whole forecast.
Sunday, 6th September morning, is another standout. A 7ft SE swell with a 13-second period and combined energy of 1488 (strong). The wind is calm, glassy conditions, and it’s rated as excellent for experienced surfers. This is a bigger, more powerful swell, so it’s not for beginners. The afternoon gets a bit of cross-onshore wind, but the morning is the real deal.
After that, the surf fades off quickly into tiny, clean but small waves through the rest of the second week. So, if you’re keen, mark your calendar for Saturday, 5th September, especially the afternoon glass—that’s the best on offer. The Sunday morning is for the more experienced crew.
Rusty.
Short Range ForecastHeavy rain (total 32mm), heaviest during Tue night. Warm (max 29°C on Mon afternoon, min 27°C on Sun night). Winds increasing (light winds from the E on Sun night, severe gales from the WNW by Tue night). | Days 5-7 Weather SummaryHeavy rain (total 26mm), heaviest during Wed night. Warm (max 29°C on Thu morning, min 27°C on Wed night). Winds decreasing (strong winds from the S on Wed night, moderate winds from the SSE by Fri afternoon). | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 12 | ESE 16 | ESE 17 | ESE 17 | ESE 17 | E 16 | N 9 | N 10 | NW 10 | NW 10 | E 13 | E 9 | E 12 | ESE 8 | ESE 7 | SE 9 | SE 8 | ESE 7 | ESE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 30 | 220 | 336 | 1842 | 5569 | 5091 | 2886 | 1724 | 2358 | 546 | 53 | 25 | 11 | 240 | 105 | 275 | 187 | 117 | 117 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 3:33AM1.68m | 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 | |||||||
Low Tide | 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 | 12:54PM0.29m | 1:06AM0.68m | 1:22PM0.30m | 1:38AM0.57m | ||||||
 |  |  |  | | |  |  | | | | | | | | | | | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 6:58 | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — |
mm | 2 | 2 | — | — | 1 | 4 | 12 | 6 | 5 | 5 | 3 | 4 | 1 | 3 | 2 | 4 | 2 | 2 | — |
Temp °C | 28 | 28 | 29 | 27 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 28 |
Feels °C | 30 | 31 | 30 | 30 | 31 | 27 | 20 | 23 | 26 | 27 | 28 | 30 | 29 | 32 | 31 | 30 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | ESE 14 | ESE 17 | ESE 17 | E 16 | ENE 14 | N 10 | NW 10 | W 9 | E 13 | SW 11 | SW 12 | SW 11 | SW 11 | SW 10 | SSW 10 | SSW 10 | SW 10 |
| kJ | 162 | 125 | 236 | 1842 | 5569 | 5091 | 2056 | 1724 | 2358 | 528 | 30 | 3286 | 2483 | 1045 | 703 | 538 | 494 | 347 | 220 |
Swell 2 Height (m) Direction Period (s) | ESE 12 | ESE 16 | ESE 17 | SW 9 | SW 9 | SW 9 | SW 9 | E 11 | ESE 10 | NW 10 | E 8 | E 9 | E 12 | E 12 | E 15 | E 13 | ENE 13 | ENE 13 | ENE 12 |
| kJ | 30 | 220 | 336 | 64 | 50 | 27 | 27 | 87 | 35 | 546 | 28 | 25 | 11 | 11 | 17 | 14 | 17 | 33 | 15 |
Swell 3 Height (m) Direction Period (s) | E 10 | ENE 11 | SW 9 | ENE 10 | — | — | — | — | E 14 | E 8 | E 13 | E 18 | E 16 | E 14 | E 12 | WSW 11 | ENE 13 | ENE 13 | SSW 11 |
| kJ | 7 | 12 | 81 | 10 | — | — | — | — | 16 | 22 | 53 | 6 | 5 | 16 | 3 | 12 | 35 | 55 | 37 |
Wind waves Height (m) Direction Period (s) | E 4 | E 5 | E 6 | ENE 7 | NNE 5 | NNE 6 | N 9 | WNW 9 | SW 7 | SSW 8 | SW 10 | S 8 | SSE 7 | ESE 8 | ESE 7 | SE 9 | SE 8 | ESE 7 | ESE 7 |
| kJ | 12 | 8 | 37 | 36 | 52 | 275 | 2886 | 3022 | 777 | 712 | 3407 | 846 | 363 | 240 | 105 | 275 | 187 | 117 | 117 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 13 | 13 | 12 | 647 | 745 | 613 | 621 | 621 | 633 | 635 | 745 | 732 | 737 | 990 | 631 | 13 | 990 | 13 |
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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