Surf Forecasts:
Californias surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 12PM (local time) - 3ft (0.9m), 6s period, E swell with offshore winds.
- Most powerful swell: Wednesday 19 Aug, 9AM (local time) - 4ft (1.2m), 7s period, E swell with 139 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 12PM (local time) - 3ft (0.9m), 6s period with E swell.
Best Forecast Surf Conditions for Californias this week:
The surf forecast for Californias over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 12PM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.2m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Californias in the next 16 days are 1.2m 7s and forecast to arrive on Wednesday (Aug 19) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 18s period and expected on Tuesday (Aug 25) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Tue 18th Aug) | 3ft (0.9m) 6s |
| Best Surf | 12PM (Tue 18th Aug) | 3ft (0.9m) 6s |
| Most Powerful | 9AM (Wed 19th Aug) | 4ft (1.2m) 7s |
Table - best surf conditions forecast for Californias over the next 16 days.
The Lowdown
Alright, let’s get into it.
This next stretch is a proper mixed bag. We are looking at a real slow patch at the start, a few days of nothing worthwhile, and then a big pulse of energy arriving late in the window. You’re gonna need patience, but there is some serious potential hiding out there if you can wait for it.
The first real session worth mentioning is on Tuesday the 18th, but honestly, it’s a bit of a tease. Early morning we’ve got clean conditions with a light east cross-off breeze and a tiny 1 ft ENE swell. It’s small, but the water’s a warm 84°, which is bang on average for this time of year. The afternoon picks up to 3 ft but the period drops to 6 seconds – that’s just crumbly, weak stuff. Surfable, but you won’t be telling your mates about it.
Wednesday the 19th is more of the same, with a slightly bigger 4 ft swell but it’s still short-period and the wind is a bit more on it. The energy is moderate (139 combined), but the quality just isn't there. Then we hit a dead zone. From Thursday the 20th right through to Monday the 24th, it’s a blank run. It’s all risk of thunderstorms and cross-off winds, with next to no swell on the cards. The energy readings are near zero, so it’s a complete no-go. That’s a solid 5-day flat spell you’ll need to sit through.
Things start to stir again on Tuesday the 25th. The morning brings a cleaner 3 ft ENE swell with the period bumping up to 10 seconds, and a proper offshore ENE wind. It’s not big, but it’s clean, and the energy reading is a moderate 105. It’s a glance-over-the-shoulder kind of day, but not the main event.
Wednesday the 26th is still a bit wonky. The morning is flat, but the afternoon throws a curveball – a 6 ft NNE swell with a short 6-second period and onshore winds. Combined energy is moderate (255), but it’s not going to be pretty. That’s a pass.
Now, hold on to your boardies, because Thursday the 27th is where it goes off. Morning sees a solid 12 ft E swell, with a very long 16-second period. The energy is a massive 7997 – that’s strong, very strong. The wind is a light offshore N, so it’s going to be clean. This is a standout. This is for the experienced crew, no doubt. This is serious groundswell. The afternoon looks similar, with 12 ft E swell and a 15-second period, energy even higher at 9601. The wind swings to a cross-shore NNW, bringing in a little chop, but with that much juice behind it, it’s still going to be a session to remember. This is a proper, expert-only, big-wave day.
Friday the 28th is a letdown after that. The wind is onshore and strong, and even though the swell is big early (16 ft ENE), it’s messy and lumpy. Not worth it.
Saturday and Sunday the 29th and 30th drop right back off. The swell fades to tiny, and the wind is howling from the NNW. Just another flat-ish, windblown weekend.
Monday the 31st is a small clean-up of the leftover energy, with a 1 ft NE swell, but it’s nothing to write home about.
Then we get to the final piece. Tuesday the 1st and especially Wednesday the 2nd. The 2nd of September is another huge one. We’re looking at a 20 ft W swell with a solid 12-second period. The energy is off the charts at 9865. It’s another expert-only, massive groundswell. Morning winds are clean and offshore, but by afternoon they pick up strong from the N, so the morning is the call. This one’s a promise, but it’s still far out, so don’t book it in stone, but it has all the makings of a proper epic.
So there you have it. A whole lot of nothing, then two massive days that are only for the brave. If you're not an expert, sit these out. If you are, mark the 27th and the 2nd. The 27th is the more reliable of the two for now.
Rusty out.
Short Range ForecastHeavy rain (total 70mm), heaviest during Thu night. Warm (max 29°C on Tue afternoon, min 26°C on Wed night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 135mm), heaviest during Fri morning. Warm (max 29°C on Sun afternoon, min 26°C on Fri morning). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | ENE 10 | E 6 | E 6 | E 7 | E 7 | ESE 8 | SE 8 | SE 8 | SSE 9 | SSE 9 | SSE 8 | E 10 | E 9 | E 9 | E 9 | E 9 | SSW 10 | SW 10 | E 9 | ESE 17 | ENE 10 |
Wave Graph | |||||||||||||||||||||
18 | 61 | 76 | 139 | 121 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 1 | 2 | 6 | 6 | 0 | 0 | 15 | 0 | 18 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 10:34AM1.85m | 10:36PM2.01m | 11:19AM1.67m | 11:07PM1.91m | 12:19PM1.50m | 11:42PM1.80m | 2:15PM1.40m | 00:33AM1.69m | 5:17PM1.48m | 2:15AM1.61m | 6:02PM1.61m | 4:01AM1.63m | 6:26PM1.73m | ||||||||
Low Tide | 4:28PM0.80m | 5:13AM0.66m | 4:55PM0.98m | 6:04AM0.75m | 5:24PM1.15m | 7:13AM0.83m | 6:02PM1.32m | 8:53AM0.84m | 8:41PM1.43m | 10:25AM0.77m | 11:03PM1.37m | 11:21AM0.66m | 11:53PM1.25m | ||||||||
6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
— | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | |
mm | — | — | 1 | 1 | 4 | 9 | 4 | 3 | 48 | 115 | 6 | 8 | 4 | 2 | — | — | — | — | — | — | — |
Temp °C | 28 | 29 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 28 | 29 | 27 | 28 | 28 | 26 |
Feels °C | 30 | 31 | 28 | 30 | 30 | 29 | 27 | 29 | 27 | 26 | 28 | 29 | 29 | 27 | 28 | 29 | 30 | 29 | 29 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 9 | SW 9 | SW 9 | SW 8 | S 9 | S 9 | SW 9 | SW 9 | SW 11 | SW 8 | SW 8 | SW 10 | SW 10 | SSW 10 | SW 10 | SSW 10 | SW 10 | ESE 16 | ESE 17 | ESE 18 |
35 | 36 | 36 | 19 | 11 | 14 | 41 | 12 | 12 | 18 | 84 | 156 | 227 | 213 | 327 | 229 | 246 | 154 | 371 | 1138 | 1518 | |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 9 | ENE 9 | S 8 | S 8 | SW 8 | SW 9 | — | SW 9 | ESE 10 | ESE 11 | ESE 6 | ESE 10 | ESE 10 | SE 10 | ESE 10 | ESE 10 | ESE 17 | SSW 10 | SSW 10 | SSW 10 |
18 | 8 | 8 | 1 | 5 | 11 | 12 | — | 12 | 10 | 11 | 11 | 9 | 10 | 4 | 9 | 9 | 59 | 154 | 135 | 83 | |
Swell 3 Height (m) Direction Period (s) | S 7 | S 7 | SE 10 | SE 10 | ESE 10 | S 10 | S 10 | — | — | ESE 10 | ESE 10 | E 10 | E 9 | E 9 | E 9 | E 9 | ESE 15 | ESE 13 | E 9 | SE 9 | ENE 10 |
4 | 4 | 4 | 4 | 10 | 2 | 8 | — | — | 10 | 18 | 9 | 1 | 2 | 6 | 6 | 21 | 35 | 15 | 3 | 18 | |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 6 | E 7 | E 7 | ESE 8 | SE 8 | SE 8 | SSE 9 | SSE 9 | SSE 8 | S 8 | SSE 9 | SSE 5 | ESE 5 | SE 4 | ESE 4 | SE 4 | SE 8 | E 6 | — |
58 | 61 | 76 | 139 | 121 | 202 | 192 | 297 | 354 | 257 | 235 | 90 | 194 | 48 | 9 | 18 | 12 | 12 | 29 | 15 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 0 | 0 | 657 | 827 | 4 | 609 | 4 | 601 | 624 | 609 | 0 | 4 | 657 | 601 | 609 | 624 | 4 | 4 | 4 | 0 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Californias Surf forecast
The above surf forecast table for Californias provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Californias can be found by selecting the local surf guide option on the grey menu. Our Californias 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 (Californias) 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 Californias 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.
Californias is 5 km (3 miles) from Misato. If you plan a holiday in Okinawa, look for hotels and other accommodation in Misato. Misato has rooms for a wide range of budgets as well as car hire and transport links.











