Surf Forecasts:
Oceanside Harbor surf forecast from 21 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 8PM (local time) - 4ft (1.2m), 14s period, S swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 8AM (local time) - 5ft (1.5m), 13s period, S swell with 769 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 8PM (local time) - 2ft (0.6m), 13s period with SSW swell.
Best Forecast Surf Conditions for Oceanside Harbor this week:
The surf forecast for Oceanside Harbor over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 8PM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.4m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Oceanside Harbor in the next 16 days are 1.5m 13s and forecast to arrive on Wednesday (Aug 26) at 8AM. 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+) | 8PM (Fri 21st Aug) | 2ft (0.6m) 13s |
| Best Surf | 8PM (Tue 25th Aug) | 4ft (1.2m) 14s |
| Most Powerful | 8AM (Wed 26th Aug) | 5ft (1.5m) 13s |
Table - best surf conditions forecast for Oceanside Harbor over the next 16 days.
The Lowdown
Alright folks, Rusty here again, giving you the lowdown in old money. We're looking at Oceanside Harbor, that jetty and beach spot we know so well.
Honestly, the next week or so is a bit of a bummer. Most days are showing poor surf with small, gutless waves and a cross-onshore breeze that'll chop things up. There's a little bump of energy arriving around the 25th of August with a S swell, maybe pushing 3ft, but the wind is still a factor, making it only a marginal call. The water is a warm 71.8°, well above where it should be for August, so the wetsuit can stay thin.
The standout, the one I've got my eye on, is shaping up for Wednesday morning, September 4th. We've got a nice, long-period groundswell from the SSW lining up, offering consistent 3ft waves. The energy reading is a solid 767, meaning there's some real grunt in the water. The key here is that while the wind will be cross-onshore, it's forecast to be light, which should keep the surf a lot cleaner than what we've been seeing. That's your window. Everything after that looks like it gets messy again with the wind picking up on the 5th. So mark your calendar for that first week of September.
Short Range ForecastMostly dry. Warm (max 27°C on Sun afternoon, min 22°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Tue morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 13 | SSW 13 | SSW 13 | SW 18 | SSW 15 | SSW 14 | SW 19 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 16 | S 16 | S 13 | S 13 | S 13 | S 12 | S 11 | S 10 | S 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 156 | 137 | 98 | 92 | 167 | 218 | 177 | 155 | 213 | 252 | 179 | 273 | 264 | 570 | 680 | 769 | 633 | 396 | 231 | 210 | 154 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | cross | cross-on | cross-on | glassy | cross-on | cross-on | on | on | cross-on | cross | cross-on | cross-on | glassy |
High Tide | 8:25AM1.36m | 5:06PM1.83m | 8:27AM1.43m | 6:08PM1.91m | 8:41AM1.49m | 6:56PM2.01m | 8:58AM1.55m | 7:35PM2.10m | 9:16AM1.61m | 8:10PM2.17m | 9:35AM1.68m | 8:44PM2.20m | 9:55AM1.75m | 9:18PM2.17m | |||||||
Low Tide | 10:09AM1.35m | 1:10AM0.54m | 11:57AM1.32m | 1:47AM0.43m | 12:51PM1.24m | 2:18AM0.34m | 1:31PM1.14m | 2:46AM0.27m | 2:06PM1.04m | 3:12AM0.24m | 2:40PM0.94m | 3:36AM0.24m | 3:15PM0.84m | 4:00AM0.29m | |||||||
 |  |  | | | | | | | | | | | | | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:24 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 22 | 25 | 25 | 23 | 26 | 27 | 23 | 26 | 26 | 24 | 27 | 27 | 25 | 26 | 27 | 23 | 25 | 25 | 23 |
Feels °C | 26 | 25 | 24 | 26 | 25 | 24 | 26 | 27 | 24 | 27 | 25 | 26 | 27 | 26 | 26 | 26 | 28 | 24 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 15 | SSW 14 | W 6 | SSW 13 | SSW 14 | W 6 | SW 17 | W 6 | SW 16 | S 16 | S 13 | S 13 | S 13 | S 12 | S 11 | S 10 | S 10 |
| kJ | 156 | 137 | 98 | 92 | 167 | 218 | 27 | 98 | 213 | 26 | 179 | 31 | 264 | 570 | 680 | 769 | 633 | 396 | 231 | 210 | 154 |
Swell 2 Height (m) Direction Period (s) | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | SSW 13 | SW 18 | SW 18 | SW 18 | SSW 12 | SW 17 | W 6 | W 7 | W 7 | W 7 | SW 16 | W 7 | W 7 | W 7 | SW 14 |
| kJ | 10 | 11 | 5 | 18 | 17 | 9 | 99 | 155 | 199 | 252 | 85 | 273 | 40 | 45 | 96 | 88 | 157 | 73 | 64 | 45 | 153 |
Swell 3 Height (m) Direction Period (s) | SW 18 | SSW 16 | SW 18 | SW 18 | SSW 12 | SW 19 | SW 19 | SSW 16 | W 5 | SSW 13 | S 14 | S 13 | S 13 | SW 16 | SW 16 | SW 16 | W 14 | SW 15 | SW 14 | SW 14 | W 7 |
| kJ | 81 | 51 | 49 | 81 | 56 | 58 | 177 | 84 | 19 | 90 | 66 | 126 | 126 | 208 | 203 | 203 | 16 | 171 | 132 | 102 | 38 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 6 | — | — | W 6 | — | — | — | — | — | W 7 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 17 | — | — | 25 | — | — | — | — | — | 64 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 68 | 0 | 68 | 68 | 0 | 68 | 68 | 12 | 68 | 68 | 0 | 68 | 32 | 68 | 47 | 116 | 7 | 46 | 46 | 0 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Oceanside Harbor Surf forecast
The above surf forecast table for Oceanside Harbor provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Oceanside Harbor can be found by selecting the local surf guide option on the grey menu. Our Oceanside Harbor 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 (Oceanside Harbor) 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 Oceanside Harbor 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.
Oceanside Harbor is 8 km (5 miles) from the city of Oceanside. If you plan a vacation in San Diego County, look for hotels and other accommodation in Oceanside. Oceanside has rooms for a wide range of budgets as well as car hire and transport links.
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