Surf Forecasts:
Tengan surf forecast from 11 Aug 2026:
- Most powerful swell: Tuesday 11 Aug, 3PM (local time) - 1.5ft (0.5m), 12s period, E swell with 72 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 0.5m 12s and forecast to arrive on Tuesday (Aug 11) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Thursday (Aug 13) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Tue 11th Aug) | 1.5ft (0.5m) 12s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you. The next couple of weeks are looking pretty grim for a proper paddle. We’ve got a long stretch of tiny, weak swell and nothing that’s going to get your heart racing. It’s going to be a test of patience, not a test of your pop-up.
The first real surf window is a no-go. We're looking at nothing but knee-high slop from Tuesday the 11th all the way through to the morning of Thursday the 20th. That’s a solid eight or nine days of ankle-biters. The swell energy is just pathetic, mostly at 73 or lower, and the periods are all over the place with no push behind them. It’s flat, it’s weak, and it's not worth suiting up for. You’re better off finding another hobby for the week.
Now, here’s where it gets interesting, but not necessarily in a good way. Around Thursday the 20th, we finally see some size arrive. The swell jumps to 10ft, and the energy readings climb into the strong category (1460). But hold your horses. That swell is coming from the SE, which is totally cross-on for Tengan, and it’s hitting with a fresh 19 mph wind. That’s not clean surf; that’s a washing machine. It’s lumpy, it’s chopped up, and at that size, it’s only for the experienced crew. The water’s still warm, about 85°, which is pretty normal for this time of year. But with that onshore wind, the whole setup looks more interesting for the kite surfers than us paddle surfers.
The swell sticks around for a few days, but the wind stays messy. By Sunday the 23rd, it’s dropping a bit, but the cross-on breeze is still there, making things rough.
Just when you think it can’t get any more chaotic, we have a proper storm surge brewing for the 25th and 26th. The energy readings are astronomical on Wednesday the 26th, hitting a massive 3653. That’s serious, heavy water. The swell is 8ft with a long 15-second period, which is a proper groundswell, but it’s paired with near-gale force winds hitting 37 mph. Tengan is a reef break, and with that much cross-shore wind and that much raw power, this is expert-level danger, not a fun session. The entire period looks blown out and wild.
So, to sum it up: absolute drought for the first part, then a couple of days of junky, blown-out swell that’s only for the brave. There’s no standout session in this whole 16-day window. Forecasts can change, but right now, this is a waiting game. Keep the board in the car just in case, but don’t hold your breath.
Rusty, signing off.
Short Range ForecastHeavy rain (total 23mm), heaviest during Wed morning. Warm (max 30°C on Tue afternoon, min 26°C on Thu afternoon). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Fri morning. Warm (max 30°C on Sun morning, min 26°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | E 12 | E 12 | ENE 12 | E 11 | ENE 11 | N 9 | N 8 | N 7 | N 8 | N 7 | ENE 10 | SW 9 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | E 4 | E 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 73 | 72 | 46 | 59 | 23 | 38 | 42 | 25 | 19 | 15 | 9 | 0 | 23 | 23 | 35 | 33 | 34 | 33 | 19 | 20 | 56 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-off | glassy | glassy | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | on | on | on |
High Tide | 6:30PM2.05m | 5:43AM2.19m | 7:07PM2.13m | 6:32AM2.26m | 7:41PM2.16m | 7:17AM2.27m | 8:11PM2.17m | 7:59AM2.21m | 8:39PM2.15m | 8:41AM2.10m | 9:05PM2.12m | 9:22AM1.96m | 9:29PM2.06m | ||||||||
Low Tide | 11:46AM0.19m | 00:02AM1.03m | 12:32PM0.12m | 00:45AM0.90m | 1:12PM0.12m | 1:25AM0.78m | 1:49PM0.19m | 2:04AM0.69m | 2:22PM0.31m | 2:42AM0.63m | 2:52PM0.48m | 3:19AM0.60m | 3:21PM0.66m | ||||||||
 | |  | | |  | | |  | | | |  | |  | | | | | | | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — |
 | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — |
mm | 3 | 1 | 4 | 5 | 4 | — | 1 | 2 | 3 | 4 | 1 | — | — | — | — | — | — | 3 | 1 | — | — |
Temp °C | 29 | 30 | 28 | 27 | 27 | 27 | 29 | 27 | 26 | 27 | 27 | 27 | 29 | 29 | 28 | 30 | 30 | 28 | 29 | 29 | 27 |
Feels °C | 33 | 34 | 32 | 31 | 32 | 32 | 32 | 29 | 28 | 29 | 31 | 31 | 32 | 32 | 33 | 34 | 34 | 32 | 31 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SW 10 | S 9 | SW 9 | SW 8 | SW 8 | SW 9 | SW 9 | WNW 6 | SSW 9 | SSW 8 | SW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 |
| kJ | 192 | 192 | 142 | 117 | 86 | 69 | 107 | 88 | 52 | 116 | 113 | 110 | 119 | 180 | 172 | 165 | 207 | 145 | 141 | 101 | 106 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 9 | SW 9 | S 9 | S 9 | S 9 | N 8 | N 7 | SSW 9 | NW 5 | N 6 | W 8 | W 8 | W 8 | W 8 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
| kJ | 194 | 140 | 101 | 78 | 76 | 74 | 42 | 25 | 124 | 7 | 7 | 18 | 35 | 28 | 19 | 33 | 34 | 33 | 19 | 19 | 20 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | ENE 12 | E 11 | ENE 11 | N 9 | S 9 | S 8 | N 8 | N 7 | ENE 10 | S 9 | ENE 11 | ENE 11 | ENE 10 | W 7 | W 8 | W 7 | W 6 | W 6 | W 6 |
| kJ | 73 | 72 | 46 | 59 | 23 | 38 | 37 | 33 | 19 | 15 | 9 | 24 | 23 | 23 | 35 | 16 | 20 | 8 | 6 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | E 6 | — | — | — | E 6 | — | — | WNW 6 | WNW 7 | — | SSE 3 | S 8 | SE 3 | ESE 3 | — | ESE 3 | E 3 | E 4 | E 5 |
| kJ | — | — | 19 | — | — | — | 5 | — | — | 10 | 42 | — | 3 | 86 | 2 | 1 | — | 3 | 5 | 20 | 56 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 10 | 12 | 10 | 11 | 12 | 14 | 29 | 27 | 37 | 27 | 12 | 12 | 27 | 12 | 12 | 12 | 12 | 12 | 12 | 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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