Surf Forecasts:
Oceanside Harbor surf forecast from 12 Sep 2026:
- Best quality surf: Thursday 17 Sep, 5AM (local time) - 3ft (0.9m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 5AM (local time) - 3ft (0.9m), 16s period, SSW swell with 402 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 8PM (local time) - 2ft (0.6m), 14s period with SW 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 Saturday (Sep 12) at 8PM. The primary swell is predicted to be 0.6m and 14s period with a secondary swell of 0.5m and 5s. 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 Thursday (Sep 17) at 5AM. 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+) | 8PM (Sat 12th Sep) | 2ft (0.6m) 14s |
| Best Surf | 5AM (Thu 17th Sep) | 3ft (0.9m) 16s |
| Most Powerful | 5AM (Thu 17th Sep) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Oceanside Harbor over the next 16 days.
The Lowdown
Alright folks, Rusty again with a look at Oceanside Harbor.
The water is 73°F, which is 5°F warmer than usual for this time of year—so it’s notably warm.
The first few days are a total dud. Starting Saturday September 12th through Monday the 14th, we’ve got tiny waves around 2 to 2 feet, cross-onshore wind from the south/southwest, and choppy conditions. Nothing worth paddling for.
We get a bit of a pulse starting Wednesday morning the 16th, with 3 feet from the SSW, long-period swell at 17 seconds, and combined energy hitting 412. That’s moderate juice, but the cross-onshore wind from the west keeps it bumpy. Still marginal.
Thursday the 17th and Friday the 18th build the energy up to 596 and 547 respectively, but the swell stays small at 3 to 3 feet, and the wind stays cross-on. For a beach/jetty break, that long period (15-19 seconds) can make the waves wall up and close out. Not ideal.
The standout comes Sunday the 20th into Monday the 21st. Sunday afternoon sees 3 feet of SW swell, 18-second period, and a combined energy of 628—that’s the biggest energy reading of the whole 16 days. Wind is light and onshore, so it’s clean enough. But Monday morning the 21st is the real gem: 3 feet, 17-second period, combined energy of 614, and the wind drops to just 3 mph from the southwest—that’s near glassy. That’s your window. The tide might play tricks, but it’s the cleanest small wave you’ll get.
Crowds? This spot is “often” busy, so on that Monday morning expect a few regulars out.
After the 21st, the energy fades. By Wednesday the 24th, it’s back to poor conditions with cross-on wind and dropping swell. The last few days are weak, with combined energy under 300 and bumpy wind.
The consistency here is very consistent, so you won’t get skunked entirely, but honestly, a lot of these days are better for a paddle than a surging ride. The single best call is Monday September 21st morning—small, clean, and the most energy of the whole run. Get on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sat morning, min 20°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Tue morning, min 19°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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) | SW 14 | SW 14 | SW 14 | SW 14 | SW 19 | W 10 | W 8 | SW 18 | SW 17 | SW 16 | SSW 20 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 19 | SW 19 | SW 19 |
Wave Graph  | |||||||||||||||||||||
 kJ | 211 | 164 | 160 | 89 | 130 | 156 | 116 | 150 | 190 | 161 | 127 | 114 | 386 | 347 | 291 | 280 | 246 | 242 | 303 | 303 | 234 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | glassy | on | cross-on | glassy | cross-on | cross-on | cross | cross-on | cross-on | glassy |
High Tide | 10:29AM2.09m | 10:46PM1.88m | 10:56AM2.10m | 11:30PM1.68m | 11:24AM2.06m | 00:18AM1.49m | 11:53AM1.99m | 1:22AM1.32m | 12:27PM1.90m | 3:52AM1.22m | 1:13PM1.80m | 2:35PM1.72m | |||||||||
Low Tide | 4:43PM0.49m | 4:40AM0.61m | 5:27PM0.50m | 5:04AM0.79m | 6:14PM0.56m | 5:24AM0.96m | 7:08PM0.64m | 5:37AM1.11m | 8:22PM0.72m | 5:04AM1.22m | 10:05PM0.73m | 11:35PM0.67m | |||||||||
 |  |  | | | | | | | | | | | | | | | | | | | |
 | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — |
 | — | 7:00 | — | — | 6:59 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 21 | 23 | 23 | 21 | 22 | 22 | 20 | 22 | 22 | 20 | 22 | 22 | 20 | 22 | 22 | 21 | 23 | 23 | 22 |
Feels °C | 24 | 24 | 23 | 23 | 23 | 23 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 21 | 22 | 21 | 22 | 22 | 21 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | W 7 | W 7 | W 10 | W 8 | W 7 | W 9 | W 9 | W 9 | SW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SW 19 | W 6 |
| kJ | 211 | 164 | 160 | 58 | 61 | 156 | 116 | 52 | 59 | 57 | 57 | 88 | 386 | 347 | 291 | 280 | 246 | 242 | 183 | 303 | 21 |
Swell 2 Height (m) Direction Period (s) | W 6 | W 6 | W 5 | SW 14 | SW 13 | SW 13 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | W 8 | W 6 | S 10 | SSW 12 | SSW 12 | SSW 12 | S 11 | SW 19 | SSW 13 | SSW 13 |
| kJ | 25 | 15 | 20 | 89 | 87 | 85 | 108 | 150 | 190 | 161 | 122 | 21 | 11 | 30 | 61 | 147 | 46 | 57 | 303 | 141 | 101 |
Swell 3 Height (m) Direction Period (s) | S 10 | S 10 | S 9 | SW 19 | SW 19 | SW 19 | SW 13 | SW 13 | SW 12 | SW 12 | SSW 20 | SSW 18 | S 9 | W 5 | S 9 | SW 21 | SW 21 | SW 21 | S 10 | S 10 | SW 19 |
| kJ | 29 | 29 | 14 | 58 | 130 | 129 | 44 | 40 | 38 | 37 | 127 | 114 | 15 | 5 | 27 | 160 | 162 | 156 | 54 | 34 | 234 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 5 | W 3 | W 4 | W 5 | W 5 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 9 | 3 | 8 | 7 | 12 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 98 | 68 | 0 | 46 | 68 | 68 | 98 | 68 | 46 | 47 | 68 | 0 | 68 | 68 | 0 | 68 | 68 | 32 | 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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