Surf Forecasts:
Oceanside Harbor surf forecast from 18 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★+): Tuesday 18 Aug, 11PM (local time) - 1.5ft (0.5m), 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 Tuesday (Aug 18) at 11PM. The primary swell is predicted to be 0.5m and 16s 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 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 (Tue 18th Aug) | 1.5ft (0.5m) 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 take a look at what's happening at Oceanside Harbor over the next couple of weeks.
Honestly, it's a bit of a flat spell to be straight with you. For a spot that's usually on the go, we're looking at a real quiet stretch. The water's feeling weirdly warm too, running about 2° warmer than what you'd expect for this time of year up here at the harbor – that's definitely noticeable.
We kick things off on Tuesday, August 18th, with the first small pulses of surf. The swell is coming from the SSW, kind of long-period around 16 to 17 seconds, but it's only pushing 2 ft. It's a groundswell, so those long waits between sets are a thing, but the energy is pretty mild at 385. The wind is light out of the WSW, so the mornings are holding clean, but the afternoon gets that cross-on kink. It’s really small and the setup isn't ideal for the jetty.
Wednesday the 19th sees a tiny bump to 3 ft from the same SSW direction. The combined energy nudges up to 451, which is still on the low side of moderate. Mornings are your best bet when the wind is light and offshore, but we're talking about marginal waves at best.
The rest of this week and into the next just drifts along. From Thursday the 20th right through to the end of August, we're stuck with tiny swell – nothing over 3 ft, and a lot of mornings around 2 ft or 2 ft. The swell direction hangs in the SSW to SW window, with periods that vary but don't really change the story. The combined energy dips well below 400 most days, and the wind is a constant cross-on, either light or a gentle breeze, keeping things choppy and uninviting for a proper paddle. This stretch from the afternoon of the 21st through to the 27th is a real dead zone.
There is a tiny glimmer as we tick over into the first week of September. The morning of Sunday the 30th of August shows a bit more juice, with the swell reaching 3 ft from the SSW with a 15-second period and combined energy of 474. The wind is still a cross-on, but it's light. The following Monday the 31st holds similar 3 ft to 3 ft swell. The problem is, all these sessions are rated as poor or marginal.
Looking way out to that first week of September, the swell hangs in there between 2 ft and 3 ft, but the wind stays on the wrong side of the compass with a gentle cross-on breeze. It’s going to look pretty average.
So, where's the standout? I can't give you one. The best on offer might be Wednesday morning, August 19th, with that 3 ft swell and light offshore wind making for the cleanest surface. It's small, but at least it won't be a complete mess. For the rest, you’re waiting on a real pulse, and this forecast doesn't show one. It's more of a time to clean the wax off your boards than a time to be in the water.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Wed morning, min 21°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sun afternoon. Warm (max 25°C on Fri morning, min 23°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 17 | SSW 15 | 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 |
Wave Graph | |||||||||||||||||||||
232 | 243 | 272 | 377 | 387 | 249 | 236 | 236 | 226 | 156 | 137 | 135 | 90 | 167 | 218 | 177 | 155 | 269 | 197 | 179 | 273 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | cross-on | cross-on | on | on | glassy | on | on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 8:58AM1.55m | 7:35PM2.10m | |||||||||
Low Tide | 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 | 1:31PM1.14m | 2:46AM0.27m | |||||||||
6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | |
— | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:24 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 23 | 24 | 22 | 25 | 25 | 23 | 24 | 24 | 23 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 24 | 25 | 26 | 25 | 23 |
Feels °C | 24 | 24 | 23 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 25 | 25 | 26 | 27 | 24 | 26 | 26 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | 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 | SW 18 | SW 17 | W 7 |
39 | 41 | 272 | 377 | 387 | 249 | 236 | 236 | 226 | 156 | 137 | 135 | 90 | 167 | 218 | 137 | 135 | 269 | 197 | 179 | 88 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 17 | W 6 | W 7 | W 6 | W 5 | W 6 | W 6 | W 5 | SW 18 | W 6 | SSW 16 | W 7 | SSW 12 | W 10 | SW 19 | SW 18 | SW 18 | SSW 12 | SSW 12 | SW 17 |
232 | 243 | 38 | 58 | 29 | 14 | 18 | 16 | 5 | 81 | 6 | 51 | 15 | 57 | 30 | 177 | 155 | 199 | 89 | 58 | 273 | |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SW 19 | SW 20 | W 14 | SW 18 | SW 19 | WSW 19 | S 10 | W 6 | SSW 16 | SW 18 | SW 18 | W 6 | SW 19 | W 6 | SSW 16 | W 5 | S 15 | S 14 | S 13 |
114 | 98 | 15 | 16 | 4 | 13 | 57 | 35 | 8 | 6 | 51 | 49 | 81 | 12 | 58 | 11 | 84 | 13 | 110 | 66 | 128 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | — | W 6 | W 6 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | — | 26 | 35 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 68 | 0 | 68 | 68 | 46 | 108 | 68 | 0 | 98 | 68 | 0 | 68 | 68 | 0 | 68 | 23 | 68 | 68 | 32 | 32 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











