Surf Forecasts:
Oceanside Harbor surf forecast from 26 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 5AM (local time) - 4.5ft (1.4m), 13s period, S swell with glassy winds.
- Most powerful swell: Saturday 29 Aug, 2AM (local time) - 4.5ft (1.3m), 17s period, SSW swell with 932 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 5AM (local time) - 4.5ft (1.4m), 13s period with S 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 26) at 5AM. The primary swell is predicted to be 1.4m and 13s period with a secondary swell of 0.7m and 16s. 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 1.3m 17s and forecast to arrive on Saturday (Aug 29) at 2AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 26th Aug) | 4.5ft (1.4m) 13s |
| Best Surf | 5AM (Wed 26th Aug) | 4.5ft (1.4m) 13s |
| Most Powerful | 2AM (Sat 29th Aug) | 4.5ft (1.3m) 17s |
Table - best surf conditions forecast for Oceanside Harbor over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's ahead for Oceanside Harbor.
The next few days are offering small, onshore slop, but from Tuesday the 26th of August through Thursday the 27th, we've got the best conditions of the whole period. The swell is a bit bigger, around 4ft from the S, and the wind is light and onshore. It's not glassy, but it's manageable and the surf, while not epic, will be the most rideable we see.
The water temp is sitting at 74°, which is much warmer than normal for this time of year, so you can get away with a shorty or even just boardies.
After that, it gets messy. Friday the 28th and Saturday the 29th see a long-period swell moving in (17 seconds), but the wind swings cross-onshore and the whole setup gets choppy. The combined energy will be moderate (488-807), but the poor wind kills it. That long-period groundswell wants to break straight at a beach setup like the harbor, so it won't be wrapping in cleanly.
From the 30th of August right through to the 8th of September, it's a poor run. The swell stays small, the wind is mostly cross-onshore or onshore, and we're looking at a solid week-plus of marginal to poor surf. There's a jump in swell forecast for the 9th of September with the combined energy hitting strong (over 2000), but it's accompanied by that same cross-onshore wind, making it another messy, disappointing setup.
Honestly, for the whole 16 days, the best bet is to make the most of that small window from the 26th to the 27th of August. It's not a standout, it's just the least compromised. The rest is a long stretch of blown-out or tiny swells. Keep your expectations low and look for a window of cleaner morning conditions.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Fri morning, min 23°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sat morning, min 20°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | S 13 | S 12 | S 12 | S 11 | S 12 | S 11 | SSW 18 | SSW 17 | SW 14 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | S 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 599 | 485 | 461 | 272 | 333 | 231 | 270 | 351 | 147 | 932 | 692 | 733 | 706 | 537 | 400 | 321 | 257 | 213 | 577 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | cross | cross-on | on | glassy | on | on | glassy | on | cross-on | cross-on | on | on | cross-on | on | cross-on | glassy |
High Tide | 8:10PM2.17m | 9:35AM1.68m | 8:44PM2.20m | 9:55AM1.75m | 9:18PM2.17m | 10:17AM1.83m | 9:53PM2.09m | 10:39AM1.90m | 10:30PM1.96m | 11:04AM1.97m | 11:10PM1.79m | 11:32AM2.02m | 11:57PM1.60m | ||||||
Low Tide | 3:12AM0.24m | 2:40PM0.94m | 3:36AM0.24m | 3:15PM0.84m | 4:00AM0.29m | 3:51PM0.76m | 4:23AM0.38m | 4:31PM0.69m | 4:46AM0.49m | 5:13PM0.65m | 5:10AM0.64m | 6:02PM0.64m | |||||||
 |  |  |  | | | | | | | | | | | | | | | | |
 | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — |
 | — | — | 7:22 | — | — | 7:21 | — | — | 7:20 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 28 | 26 | 25 | 26 | 26 | 23 | 24 | 24 | 22 | 23 | 22 | 21 |
Feels °C | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 29 | 26 | 27 | 27 | 27 | 26 | 24 | 24 | 23 | 23 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 12 | S 12 | S 11 | S 12 | S 11 | S 10 | SSW 17 | S 9 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | S 13 |
| kJ | 599 | 485 | 461 | 272 | 333 | 231 | 154 | 351 | 73 | 932 | 692 | 733 | 706 | 537 | 400 | 321 | 257 | 213 | 577 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 18 | S 9 | SW 14 | S 8 | W 7 | W 7 | W 7 | W 8 | W 7 | W 7 | W 6 | S 12 | W 5 |
| kJ | 203 | 302 | 196 | 171 | 169 | 132 | 270 | 81 | 147 | 34 | 59 | 44 | 80 | 93 | 61 | 58 | 41 | 144 | 14 |
Swell 3 Height (m) Direction Period (s) | W 6 | W 6 | W 6 | W 13 | SSW 19 | SW 18 | SW 14 | W 11 | W 10 | W 7 | S 8 | WNW 9 | S 8 | SSE 14 | S 13 | SSE 12 | S 12 | SSW 16 | SW 13 |
| kJ | 11 | 21 | 11 | 55 | 142 | 81 | 116 | 59 | 70 | 21 | 20 | 27 | 11 | 66 | 89 | 48 | 112 | 89 | 85 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 26 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 98 | 7 | 9 | 83 | 46 | 0 | 171 | 68 | 0 | 68 | 68 | 68 | 68 | 68 | 4 | 68 | 68 | 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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