Surf Forecasts:
Oceanside Harbor surf forecast from 17 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: Tuesday 18 Aug, 8AM (local time) - 3ft (0.9m), 16s period, SSW swell with 402 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2AM (local time) - 2.5ft (0.8m), 14s 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 Tuesday (Aug 18) at 2AM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 0.7m 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 Tuesday (Aug 18) at 8AM. 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+) | 2AM (Tue 18th Aug) | 2.5ft (0.8m) 14s |
| Best Surf | 5AM (Mon 24th Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 8AM (Tue 18th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Oceanside Harbor over the next 16 days.
The Lowdown
Alright, listen up, it’s Rusty. I’ve been through the numbers for your local break, and I gotta be honest – the first half of this forecast is a waiting game. We’re looking at a long stretch of nothing much before we finally get a couple of windows of clean fun.
From Monday the 17th of August, we’re stuck in a rut. The swell is tiny, maybe 2ft to 3ft, coming from the SSW, and the wind is onshore or cross-onshore from the west almost every day. The combined energy is moderate, mostly between 149 and 436 (moderate), but it’s all messy and choppy. The data keeps saying “poor surf conditions.” There’s a tiny chance on the 19th that’s called “marginal,” but it’s still small and not clean. It’s a solid ten-day dry spell, plain and simple.
The first real change comes on Thursday the 27th of August. The afternoon at Oceanside Harbor (beach/jetty) turns glassy. The wind swings to a light ESE, dead calm. The swell is still only about 2ft from the SSW, but when it’s that clean, a 2ft wave is a beautiful thing. The combined energy is 265 (moderate), so it’s not powerful, but it’s smooth. This is a small, clean session for the die-hards.
Now, the one you need to mark on your calendar is Sunday the 30th of August. The morning at Oceanside Harbor is a stunner. The wind is glassy again – a light WSW breeze at 5 mph. The swell picks up to about 3ft from the SSW, and the combined energy jumps to 658 (strong to very strong). The forecast actually says “expect very good surf conditions.” That’s the one. With a 15-second period, it’s a real groundswell. You’ll get longer waits between sets, but the waves will have more shape and power. It’ll be clean, it’ll have some punch, and it’s the best bet in the whole 16-day window.
Friday the 28th of August afternoon also looks good, with a light cross-offshore wind from the NNW keeping things clean, and 3ft of SW swell. That’s a solid backup option, but Sunday morning is the winner.
Oceanside Harbor can get crowded, being an exposed spot, but for that Sunday morning glass-off, you’ll be happy to share the lineup.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Tue afternoon, min 20°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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 14 | SSW 14 | SSW 14 | SSW 16 | SSW 17 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 15 | SSW 14 | SW 19 | SW 18 | SSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 330 | 264 | 257 | 232 | 243 | 272 | 377 | 387 | 249 | 236 | 236 | 226 | 156 | 137 | 135 | 92 | 123 | 218 | 177 | 155 | 269 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | on | cross-on | glassy | on | on | glassy | on | on | glassy | on | on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy |
High Tide | 1:01PM1.93m | 1:36AM1.37m | 1:41PM1.88m | 3:24AM1.21m | 2:34PM1.82m | 3:47PM1.80m | 8:25AM1.36m | 5:06PM1.83m | 8:27AM1.43m | 6:08PM1.91m | 8:41AM1.49m | 6:56PM2.01m | |||||||||
Low Tide | 7:51PM0.79m | 6:47AM0.96m | 9:16PM0.81m | 7:02AM1.12m | 10:59PM0.76m | 00:19AM0.65m | 10:09AM1.35m | 1:10AM0.54m | 11:57AM1.32m | 1:47AM0.43m | 12:51PM1.24m | 2:18AM0.34m | |||||||||
 | |  | | |  | | | | | | | | | | | | | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 21 | 23 | 24 | 22 | 24 | 24 | 23 | 25 | 25 | 22 | 24 | 25 | 24 | 26 | 26 | 24 | 26 | 26 | 23 |
Feels °C | 22 | 23 | 22 | 23 | 24 | 23 | 25 | 24 | 26 | 26 | 25 | 24 | 24 | 25 | 25 | 26 | 25 | 27 | 27 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | W 6 | W 6 | SSW 15 | 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 |
| kJ | 330 | 264 | 257 | 39 | 39 | 272 | 377 | 387 | 249 | 236 | 236 | 226 | 156 | 137 | 135 | 92 | 123 | 218 | 137 | 135 | 269 |
Swell 2 Height (m) Direction Period (s) | W 6 | SSW 18 | W 6 | SSW 16 | SSW 17 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | SW 18 | W 6 | SW 18 | SW 18 | SSW 12 | W 10 | SW 19 | SW 18 | SW 18 |
| kJ | 24 | 63 | 33 | 232 | 243 | 36 | 41 | 29 | 16 | 17 | 16 | 5 | 81 | 6 | 49 | 51 | 89 | 17 | 177 | 155 | 199 |
Swell 3 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | SSW 13 | SSW 13 | SW 19 | SW 20 | W 14 | SW 18 | SW 19 | WSW 19 | S 10 | W 6 | SSW 16 | SSW 16 | SSW 17 | W 10 | SW 19 | SSW 16 | SSW 16 | W 5 |
| kJ | 8 | 8 | 2 | 114 | 98 | 15 | 16 | 4 | 13 | 57 | 35 | 8 | 6 | 51 | 51 | 29 | 18 | 58 | 86 | 84 | 7 |
Wind waves Height (m) Direction Period (s) | — | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | — |
| kJ | — | 25 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 68 | 0 | 68 | 68 | 0 | 68 | 68 | 0 | 98 | 171 | 0 | 98 | 171 | 0 | 68 | 68 | 0 | 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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