
Surf Forecasts:
Seaside Reef surf forecast from 11 Sep 2026:
- Best quality surf: Friday 11 Sep, 8AM (local time) - 3.5ft (1.0m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 8PM (local time) - 3.5ft (1.0m), 16s period, SW swell with 489 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 8AM (local time) - 3.5ft (1.0m), 16s period with SW swell.
Best Forecast Surf Conditions for Seaside Reef this week:
The surf forecast for Seaside Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 11) at 8AM. The primary swell is predicted to be 1.0m and 16s period with a secondary swell of 0.8m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Seaside Reef in the next 16 days are 1.0m 16s and forecast to arrive on Thursday (Sep 10) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Fri 11th Sep) | 3.5ft (1.0m) 16s |
| Best Surf | 8AM (Fri 11th Sep) | 3.5ft (1.0m) 16s |
| Most Powerful | 8PM (Thu 10th Sep) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Seaside Reef over the next 16 days.
The Lowdown
Alright, folks, let’s be real—the next week and a half is looking pretty bleak. We’ve got a whole lot of swell but no power, and a bunch of cross-onshore junk wind messing it all up. It’s one of those times when you’re better off checking the cams and doing something else. This is a spot that’s already inconsistent, so it’s not a huge surprise, but it’s still a bummer when the ocean looks like that.
From the 10th to the 15th, the swell is just tiny with all those poor surf conditions. Wave heights are down at 1 to 4ft, and the period is mostly short, which means weak and wobbly. The wind is not helping either, coming across the swell most of the time and chopping it up. You’d be fighting a losing battle if you even bothered.
But then things start to shift around the 16th. The wind finally swings to the west and lightens up, and we get a proper groundswell with period pushing 17 seconds. The wave height climbs back to 3 to 4ft, and the energy is getting stronger. This is when I’d start taking a serious look at Seaside Reef (San Diego County). It’s an expert-only reef, and with this long-period energy, it’s going to be making some proper waves. It’s still a finicky spot, but when the period is up and the wind is clean, it’s a thing of beauty.
The standout days are looking like the 20th and 21st. The 20th has that swell building with a clean 18-second period, and the winds are light. The energy readings are hitting their highest of the whole run, up in the 700s range. That’s some proper juice. The 21st is similar, with a bit more size at 4ft, and still those calm winds. These are your big wave days, but be warned, 4ft faces on a reef break are not for beginners. This is the advanced crew’s playground and an inconsistent one at that, so you have to be on your game.
The days after that, the 22nd through the 24th, the swell holds up but loses some of that long-period magic, dropping to 14-16 seconds. Still rideable, especially with the light winds in the morning. The 23rd afternoon gets a bit ugly with a moderate cross-onshore, so pick your sessions.
Then, to finish it up, the 25th brings in a monster period of 21 seconds. That’s very long-period groundswell, which can mean the waves just jack up and close out in sections. That’s a case where it might break a little too straight at a reef, so be wary. The morning has light winds, so it’s still worth a look if you’re chasing the extreme.
Like I said, it’s a waiting game, but when the swell and wind line up around the 20th and 21st, we’re in for a treat. Just remember, this break doesn’t fire often, so when it does, you’ve got to be ready to move.
That’s it from me. Go get some.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Thu afternoon, min 20°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Sun afternoon, min 19°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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) | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 13 | SW 19 | W 9 | W 8 | SW 18 | SW 17 | SW 16 | S 20 | SW 16 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | ||||||||||||||||||||
496 | 483 | 471 | 360 | 309 | 248 | 208 | 158 | 134 | 130 | 202 | 138 | 192 | 188 | 163 | 194 | 157 | 475 | 339 | 366 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross-on | on | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | glassy | on | on | glassy |
High Tide | 9:20PM2.20m | 10:00AM2.05m | 10:03PM2.06m | 10:28AM2.09m | 10:45PM1.88m | 10:55AM2.09m | 11:29PM1.68m | 11:23AM2.06m | 00:17AM1.49m | 11:52AM1.99m | 1:21AM1.32m | 12:26PM1.89m | 3:50AM1.22m | |||||||
Low Tide | 3:17PM0.61m | 3:45AM0.28m | 4:00PM0.53m | 4:13AM0.43m | 4:42PM0.49m | 4:39AM0.61m | 5:26PM0.51m | 5:03AM0.79m | 6:13PM0.56m | 5:23AM0.96m | 7:07PM0.64m | 5:35AM1.11m | 8:21PM0.72m | |||||||
— | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | |
7:01 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:54 | — | — | 6:53 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 25 | 25 | 25 | 23 | 24 | 24 | 21 | 24 | 23 | 21 | 22 | 22 | 20 | 22 | 22 | 20 | 21 | 21 | 20 |
Feels °C | 28 | 26 | 25 | 24 | 25 | 25 | 24 | 23 | 23 | 22 | 22 | 21 | 20 | 21 | 22 | 21 | 21 | 21 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | W 6 | W 6 | W 6 | W 7 | W 7 | W 9 | W 8 | W 9 | W 9 | W 9 | W 9 | W 8 | SSW 17 | SSW 16 | SSW 16 |
496 | 483 | 471 | 360 | 309 | 47 | 44 | 64 | 134 | 103 | 202 | 138 | 168 | 102 | 99 | 76 | 48 | 475 | 339 | 366 | |
Swell 2 Height (m) Direction Period (s) | W 6 | W 6 | W 6 | W 6 | W 6 | SW 14 | SW 14 | SW 14 | SSW 13 | SW 13 | SW 13 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | W 6 | W 6 | W 5 |
15 | 22 | 54 | 38 | 33 | 248 | 208 | 158 | 120 | 87 | 85 | 108 | 192 | 188 | 163 | 157 | 157 | 20 | 16 | 9 | |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SSW 11 | S 10 | S 10 | S 9 | S 10 | S 9 | S 9 | S 8 | SW 19 | SW 19 | SW 13 | SW 12 | SW 12 | SW 12 | S 20 | SSW 18 | S 9 | S 9 | S 9 |
45 | 39 | 19 | 17 | 16 | 29 | 28 | 13 | 12 | 130 | 127 | 84 | 39 | 38 | 37 | 194 | 110 | 14 | 14 | 16 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 21 | 19 | 19 | 89 | 19 | 19 | 42 | 42 | 0 | 116 | 90 | 10 | 116 | 19 | 4 | 116 | 42 | 0 | 42 | 42 |
Best forecast wave conditions in San Diego County | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Seaside Reef Surf forecast
The above surf forecast table for Seaside Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Seaside Reef can be found by selecting the local surf guide option on the grey menu. Our Seaside Reef 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 (Seaside Reef) 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 Seaside Reef 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.
Seaside Reef is 1 km (1 miles) from the city of Encinitas. If you plan a vacation in San Diego County, look for hotels and other accommodation in Encinitas. Encinitas has rooms for a wide range of budgets as well as car hire and transport links.










