Surf Forecasts:
San Gabriel Rivermouth surf forecast from 30 Aug 2026:
- Best quality surf: Sunday 6 Sep, 2AM (local time) - 3ft (0.9m), 15s period, SSW swell with glassy winds.
- Most powerful swell: Friday 4 Sep, 5PM (local time) - 3.5ft (1.0m), 16s period, SSW swell with 566 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 8AM (local time) - 2.5ft (0.7m), 11s period with S swell.
Best Forecast Surf Conditions for San Gabriel Rivermouth this week:
The surf forecast for San Gabriel Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 01) at 8AM. The primary swell is predicted to be 0.7m and 11s period with a secondary swell of 0.5m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at San Gabriel Rivermouth in the next 16 days are 1.0m 16s and forecast to arrive on Friday (Sep 04) at 5PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 1st Sep) | 2.5ft (0.7m) 11s |
| Best Surf | 2AM (Sun 6th Sep) | 3ft (0.9m) 15s |
| Most Powerful | 5PM (Fri 4th Sep) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for San Gabriel Rivermouth over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s switch over to the good ol’ imperial system for you.
The long-range look at the San Gabriel Rivermouth is a bit of a slow burn. The first week is mostly a fight with the wind, so you’ll be sitting on the beach more than in the water.
The swell is mostly from the SSW and S, with the combined energy of all swells directed here running between 230 and 733 units. That’s a moderate to strong amount of energy, but the wind is onshore or cross-onshore for most of the early days, churning it up into a mess. Water temp is about normal for the season.
The real bright spot is Sunday, the 6th of September. The morning session has a clean 3ft S swell with a 13-second period, and a light cross-offshore breeze out of the ESE at 6 mph. The energy is solid (676 units), and the wind will have the waves looking glassy. It’s an inconsistent spot, so you’ll be waiting for the sets, but they’ll be good. The afternoon gets even better. The swell bumps up to 4ft from the S, still at 13 seconds, and the wind switches to a light cross-offshore from the NNW at 9 mph. The energy climbs to 808 units, and the river mouth will be turning out some clean, lined-up waves. This is the clear winner for the whole 16-day window.
Monday the 7th still has some size at 4ft, but the wind turns cross-on from the S at 6 mph, so it’s a bit bumpier. After that, it’s back to onshore wind and weaker surf until the energy fades out completely.
Mark your calendar for the 6th. That’s the one.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sun morning, min 20°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Wed afternoon, min 21°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | S 11 | S 11 | SSW 12 | SSW 13 | SSW 12 | S 10 | SSW 12 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 604 | 417 | 330 | 261 | 233 | 184 | 154 | 116 | 110 | 87 | 212 | 198 | 86 | 158 | 223 | 553 | 448 | 566 | 525 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | on | on | on | cross-on | on | on | cross-on | glassy | on | cross-on | cross-on | cross | on | cross-on |
High Tide | 10:36PM1.97m | 11:10AM1.98m | 11:16PM1.80m | 11:39AM2.03m | 00:03AM1.60m | 12:12PM2.05m | 1:05AM1.40m | 12:55PM2.04m | 2:49AM1.24m | 1:54PM2.02m | 6:07AM1.26m | 3:18PM2.01m | |||||||
Low Tide | 4:52AM0.50m | 5:20PM0.66m | 5:16AM0.65m | 6:09PM0.64m | 5:40AM0.80m | 7:10PM0.65m | 6:04AM0.96m | 8:30PM0.65m | 6:31AM1.11m | 10:12PM0.59m | 7:12AM1.26m | 11:41PM0.45m | |||||||
 |  | | | | | | | | | | | | | | | | | | |
 | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — |
 | — | — | 7:20 | — | — | 7:19 | — | — | 7:17 | — | — | 7:16 | — | — | 7:15 | — | — | 7:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 25 | 25 | 23 | 23 | 23 | 22 | 23 | 24 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 22 |
Feels °C | 25 | 26 | 25 | 23 | 23 | 22 | 21 | 22 | 21 | 21 | 22 | 22 | 21 | 22 | 21 | 22 | 22 | 22 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 14 | W 7 | SSW 14 | S 12 | S 11 | S 11 | S 11 | W 5 | SSW 13 | SSW 12 | W 6 | SSW 12 | SSW 12 | SSW 18 | SSW 17 | SSW 16 | SSW 16 |
| kJ | 604 | 417 | 330 | 96 | 233 | 184 | 116 | 116 | 110 | 28 | 212 | 198 | 32 | 158 | 153 | 553 | 448 | 566 | 525 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 7 | W 7 | SSW 14 | S 13 | SSW 14 | W 5 | SSW 13 | SSW 13 | S 10 | W 6 | SW 16 | S 10 | W 6 | SSW 18 | SSW 11 | W 6 | SSW 11 | W 6 |
| kJ | 80 | 82 | 60 | 261 | 166 | 166 | 21 | 99 | 69 | 46 | 23 | 129 | 74 | 37 | 223 | 64 | 50 | 115 | 36 |
Swell 3 Height (m) Direction Period (s) | S 8 | SSE 13 | SSE 12 | S 13 | W 6 | SW 19 | SSW 13 | W 6 | SW 18 | SSW 12 | SW 16 | SSW 20 | SSW 12 | SW 15 | SW 15 | S 13 | SSW 11 | SSE 14 | SSW 11 |
| kJ | 11 | 34 | 50 | 123 | 38 | 14 | 154 | 15 | 50 | 87 | 133 | 40 | 86 | 113 | 109 | 29 | 85 | 20 | 78 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | W 6 | — | — | W 5 | — | — | W 6 | — | — | W 6 | W 6 | W 6 | W 6 | WNW 6 |
| kJ | — | — | — | — | — | 25 | — | — | 14 | — | — | 23 | — | — | 23 | 61 | 78 | 32 | 62 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 29 | 29 | 69 | 29 | 29 | 92 | 25 | 30 | 143 | 36 | 143 | 92 | 0 | 29 | 143 | 29 | 28 | 146 | 29 |
Best forecast wave conditions in Orange County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the San Gabriel Rivermouth Surf forecast
The above surf forecast table for San Gabriel Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at San Gabriel Rivermouth can be found by selecting the local surf guide option on the grey menu. Our San Gabriel Rivermouth 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 (San Gabriel Rivermouth) 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 San Gabriel Rivermouth 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.
San Gabriel Rivermouth is 1 km (1 miles) from the city of Seal Beach. If you plan a vacation in Orange County, look for hotels and other accommodation in Seal Beach. Seal Beach has rooms for a wide range of budgets as well as car hire and transport links.
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