Surf Forecasts:
Japs Cove surf forecast from 29 Aug 2026:
- Best quality surf: Sunday 30 Aug, 5AM (local time) - 3ft (0.9m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Saturday 29 Aug, 5PM (local time) - 3ft (0.9m), 16s period, SSW swell with 402 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 5AM (local time) - 3ft (0.9m), 16s period with SSW swell.
Best Forecast Surf Conditions for Japs Cove this week:
The surf forecast for Japs Cove over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 30) at 5AM. The primary swell is predicted to be 0.9m and 16s period with a secondary swell of 1.2m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Japs Cove in the next 16 days are 0.9m 16s and forecast to arrive on Saturday (Aug 29) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 30th Aug) | 3ft (0.9m) 16s |
| Best Surf | 5AM (Sun 30th Aug) | 3ft (0.9m) 16s |
| Most Powerful | 5PM (Sat 29th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Japs Cove over the next 16 days.
The Lowdown
Alright, this is Rusty.
First up, a real tough one. This 16-day window for Japs Cove starts with a bit of hope but quickly turns into a long, frustrating wait. The whole period is basically a write-off for any decent, clean surfing.
The only flicker of something rideable comes right at the start, on Saturday the 29th of August. With a south-southwest swell of 3 ft and a very long period of 17 seconds, there's energy in the water - you can feel it with a combined energy of 403. But it's not a simple story. The water temp is at 74°F, which is a wild 8°F warmer than normal for this time of year - seriously unusual. The problem from the get-go is the wind. It's cross-on, and while it's a light breeze, it's enough to mess with that long-period groundswell. For a sheltered reef like Japs Cove, that direction is a killer. It stays poor through the morning with a score that's basically zero, and then it gets worse as the wind picks up in the afternoon. It's a cruel tease.
After that, it's a dead zone. From Sunday the 30th of August all the way through to the end of the forecast on September 13th, the guidance file shows nothing but "poor surf conditions" for every single session. The swell sticks around, mostly from the SSW and sometimes S, with heights rarely cracking 3 ft, but the wind is almost always cross-on or cross-shore, and the quality just isn't there. The wind state is either "choppy" or "cross-chop" - you don't want to be out in that. Even the few moments of light offshore or near-calm conditions don't save it because the swell energy is weak or the tide is against it. There are no standouts here, no hidden gems. The entire second week is a total bust.
So here's the deal: Japs Cove (Big Island) is an inconsistent, advanced reef break that needs everything to line up. In this 16-day window, it just doesn't. If you were thinking of paddling out, save your energy. The setup looks far more interesting for kite surfing than paddle surfing, with those onshore winds blowing across the bay. It's a long, blank run, but for this area, a stretch like this isn't out of the ordinary. Forecasts can change, but right now, there's nothing on the table.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat afternoon, min 20°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Tue afternoon, min 20°C on Tue morning). Mainly fresh winds. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | S 11 | SW 18 | SSW 12 | SSW 12 | SSW 12 | SW 15 | SSW 12 | SW 18 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||||
373 | 402 | 392 | 279 | 242 | 180 | 134 | 110 | 101 | 67 | 58 | 79 | 157 | 145 | 150 | 115 | 130 | 319 | 325 | 343 | 326 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross | cross | cross-on | cross | cross-on | on | cross-on | glassy | cross-on | cross-on | glassy |
High Tide | 10:48AM1.89m | 10:38PM1.95m | 11:13AM1.95m | 11:18PM1.78m | 11:41AM2.00m | 00:06AM1.58m | 12:15PM2.03m | 1:09AM1.38m | 12:57PM2.03m | 2:54AM1.23m | 1:57PM2.00m | 6:19AM1.25m | 3:20PM2.00m | ||||||||
Low Tide | 4:38PM0.71m | 4:54AM0.51m | 5:22PM0.67m | 5:18AM0.65m | 6:12PM0.65m | 5:41AM0.81m | 7:14PM0.65m | 6:06AM0.96m | 8:35PM0.64m | 6:31AM1.11m | 10:16PM0.58m | 7:05AM1.25m | 11:45PM0.44m | ||||||||
6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | |
— | 7:22 | — | — | 7:21 | — | — | 7:20 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 25 | 24 | 23 | 23 | 22 | 21 | 22 | 21 | 22 | 23 | 22 | 22 | 23 | 22 | 22 | 23 | 23 | 22 | 23 | 22 |
Feels °C | 26 | 26 | 24 | 25 | 22 | 21 | 21 | 20 | 20 | 22 | 21 | 17 | 21 | 20 | 19 | 22 | 22 | 22 | 22 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | W 8 | W 7 | SSW 15 | W 7 | W 6 | SSW 14 | W 5 | SSW 13 | S 11 | S 10 | SSW 12 | SSW 12 | W 6 | W 6 | SSW 12 | W 6 | SSW 17 | SSW 16 | SSW 16 |
373 | 402 | 186 | 93 | 242 | 107 | 33 | 110 | 21 | 67 | 58 | 31 | 157 | 145 | 44 | 33 | 119 | 63 | 325 | 343 | 326 | |
Swell 2 Height (m) Direction Period (s) | W 6 | W 9 | SSW 16 | SSW 15 | W 9 | SSW 14 | SSW 14 | S 12 | SSW 13 | W 5 | SW 13 | SSW 12 | W 5 | SW 16 | SSW 12 | SSW 12 | SSW 18 | SW 18 | W 6 | SSW 11 | W 6 |
25 | 15 | 392 | 279 | 15 | 180 | 134 | 75 | 101 | 8 | 45 | 29 | 19 | 67 | 150 | 109 | 130 | 319 | 36 | 82 | 25 | |
Swell 3 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | SSE 13 | SSE 12 | SSE 12 | S 13 | SW 19 | S 11 | SSE 11 | SW 18 | SW 18 | SW 16 | SSW 20 | SW 18 | SW 15 | SW 15 | SSW 11 | SW 13 | S 13 | SW 10 |
5 | 5 | 5 | 17 | 15 | 27 | 89 | 14 | 63 | 38 | 49 | 79 | 95 | 40 | 84 | 115 | 77 | 109 | 130 | 13 | 52 | |
Wind waves Height (m) Direction Period (s) | — | W 6 | — | — | W 7 | — | — | W 6 | — | — | W 3 | W 5 | — | W 5 | W 6 | — | W 5 | — | — | W 5 | — |
— | 37 | — | — | 58 | — | — | 22 | — | — | 7 | 26 | — | 18 | 71 | — | 21 | — | — | 21 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 51 | 11 | 11 | 64 | 4 | 11 | 77 | 11 | 11 | 127 | 4 | 73 | 156 | 27 | 11 | 51 | 0 | 10 | 73 | 0 |
Best forecast wave conditions in Los Angeles County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Japs Cove Surf forecast
The above surf forecast table for Japs Cove provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Japs Cove can be found by selecting the local surf guide option on the grey menu. Our Japs Cove 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 (Japs Cove) 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 Japs Cove 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.
Japs Cove is 5 km (3 miles) from Rancho Palos Verdes. If you plan a vacation in Los Angeles County, look for hotels and other accommodation in Rancho Palos Verdes. Rancho Palos Verdes has rooms for a wide range of budgets as well as car hire and transport links.











