Surf Forecasts:
Oceanside Harbor surf forecast from 19 Aug 2026:
- Best quality surf: Monday 24 Aug, 5AM (local time) - 2.5ft (0.8m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 5PM (local time) - 3ft (0.9m), 16s period, SSW swell with 387 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 11PM (local time) - 2.5ft (0.8m), 16s 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 Wednesday (Aug 19) at 11PM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.6m 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 0.9m 16s and forecast to arrive on Wednesday (Aug 19) 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+) | 11PM (Wed 19th Aug) | 2.5ft (0.8m) 16s |
| Best Surf | 5AM (Mon 24th Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 5PM (Wed 19th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Oceanside Harbor over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s chew the fat on what’s coming down the pipe for the next couple of weeks.
We’re looking at a slow start, no doubt. The first few days are pretty flat and uninspiring, with small, weak swell and winds that are not doing us any favors. The real glimmer of hope doesn’t show up until the very end of the month.
The standout session is shaping up to be Saturday, August 29th at Oceanside Harbor. We’re seeing a welcome bump in swell size to around 3ft to 4ft out of the SSW, with a combined wave energy of 677 to 709 (moderate energy). The swell period is a solid 16 to 17 seconds, which is a nice long-period groundswell. That’s packing some punch and should wrap into the harbor nicely. The wind is light and from the SSW and WSW – a light breeze. This is a major plus, meaning the surface should be clean and glassy. With the harbor setup, that long period swell should really focus up. Crows are listed as "often" here, so expect a few other folks with the same idea.
The week leading up to that is a bit of a grind. From Wednesday, August 19th through to Tuesday, August 25th, you’re looking at tiny surf, mostly 2ft to 3ft from the SSW or SW. The combined energy is low, staying in the 100s and low 200s. The wind is a persistent light breeze, but it’s cross-onshore, keeping the surface a little bumpy. It’s marginal at best for a paddle.
The week after, from September 1st onward, the surf drops back down again, with small 2ft waves and the energy fading. It’s going to be a long wait for that August 29th window.
There’s a brief moment on Sunday, August 23rd, with a 2ft swell from the SW but a long period of 19 seconds. That’s a very long-period groundswell, but the size is just too small to get excited about. Same for the following days – the energy is there, but the height just isn’t.
So, in short: don’t rush out this week. Keep your eyes on Saturday, August 29th at Oceanside Harbor. That’s your best bet for some clean, waist-high plus waves. It’s a promise with a bit of time to go, but it’s the one that stands out in the charts.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Fri morning, min 20°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 18 | SSW 15 | SSW 14 | SW 19 | SW 18 | SSW 14 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 377 | 387 | 249 | 236 | 236 | 175 | 156 | 137 | 135 | 92 | 167 | 218 | 177 | 154 | 269 | 252 | 179 | 273 | 264 | 208 | 203 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | on | glassy | on | cross-on | glassy | on | cross-on | glassy | on | cross-on | cross-on | cross-on | cross-on | glassy | on | cross-on | cross-on |
High Tide | 2:34PM1.82m | 3:47PM1.80m | 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 | |||||||||
Low Tide | 10:59PM0.76m | 00:19AM0.65m | 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 | |||||||||
 |  |  | | | | | | | | | | | | | | | | | |  | |
 | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:24 | — | — | 7:23 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 21 | 23 | 23 | 22 | 24 | 24 | 23 | 25 | 24 | 23 | 25 | 25 | 23 | 25 | 25 | 23 | 24 | 25 | 23 |
Feels °C | 24 | 23 | 23 | 24 | 23 | 23 | 25 | 24 | 25 | 26 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 14 | SW 18 | SW 17 | W 6 | SW 16 | SW 16 | W 6 |
| kJ | 377 | 387 | 249 | 236 | 236 | 175 | 156 | 137 | 135 | 92 | 167 | 218 | 99 | 135 | 269 | 252 | 179 | 42 | 264 | 208 | 44 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | SSW 12 | W 6 | W 6 | SW 18 | SW 18 | SSW 12 | SSW 12 | SW 17 | S 13 | S 13 | SW 16 |
| kJ | 58 | 41 | 25 | 25 | 16 | 10 | 12 | 11 | 5 | 19 | 56 | 10 | 27 | 154 | 199 | 89 | 58 | 273 | 126 | 125 | 203 |
Swell 3 Height (m) Direction Period (s) | SW 20 | W 14 | SW 18 | SW 19 | WSW 19 | S 10 | SW 18 | SSW 16 | SW 18 | SW 18 | W 6 | SW 19 | SW 19 | S 16 | W 5 | S 15 | S 14 | S 13 | W 18 | W 18 | S 13 |
| kJ | 16 | 4 | 13 | 57 | 35 | 8 | 81 | 51 | 49 | 81 | 11 | 58 | 177 | 45 | 14 | 109 | 66 | 126 | 6 | 24 | 81 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | — | W 6 | W 6 | — | W 6 | W 6 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 16 | — | 15 | 22 | — | 36 | 42 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 68 | 0 | 98 | 68 | 0 | 98 | 68 | 0 | 68 | 68 | 0 | 68 | 68 | 15 | 68 | 32 | 0 | 68 | 32 | 32 |
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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