Surf Forecasts:
15th Street surf forecast from 16 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 8AM (local time) - 3ft (0.9m), 17s period, SSW swell with glassy winds.
- Most powerful swell: Monday 21 Sep, 2PM (local time) - 3.5ft (1.1m), 17s period, SW swell with 625 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 11PM (local time) - 1.5ft (0.4m), 19s period with SSW swell.
Best Forecast Surf Conditions for 15th Street this week:
The surf forecast for 15th Street over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 11PM. The primary swell is predicted to be 0.4m and 19s period with a secondary swell of 0.6m and 9s. Another secondary swell of 0.4m and 16s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at 15th Street in the next 16 days are 1.1m 17s and forecast to arrive on Monday (Sep 21) at 2PM. 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 15th Sep) | 1.5ft (0.4m) 19s |
| Best Surf | 8AM (Wed 16th Sep) | 3ft (0.9m) 17s |
| Most Powerful | 2PM (Mon 21st Sep) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for 15th Street over the next 16 days.
The Lowdown
Hey everyone, Rusty here. Let’s talk about what 15th Street has in store.
To be straight with you, the next couple weeks look pretty slim. The first few days are just poor – no way around it. The water’s running a lot warmer than normal for mid-September, about 73°, which is more than 3° above what you’d usually see. That’s a real anomaly.
We’ve got a long-period SSW groundswell rolling through, but the wind is messing it up early on. On Tuesday the 15th and Wednesday the 16th, it’s cross-onshore, leaving the surface choppy. The swell’s tiny too, only 2ft, and the wave energy is low, starting around 274 and only getting to 518 by Wednesday morning. Not enough to bother with.
Starting Thursday the 17th and through the weekend, the wind goes light offshore from the west, which is a big improvement. The swell stays small, around 3ft to 3ft, but the period is nice and long, 15 to 18 seconds. That’s real groundswell, and for a beach and reef setup like 15th Street, it can mean clean little lines. The combined energy climbs into the moderate range, hitting 540 by Saturday morning. Still, the forecasts only call it marginal – it’s small and a bit inconsistent.
The best chance you’ll get is on Sunday the 21st. We’re looking at a 3ft to 4ft SSW swell with a 17-second period, and the combined energy hits 734. The wind is cross-onshore from the SW, but light, so it’s not a total washout. Sunday morning might offer the cleanest windows, but it’s still just a marginal day. Not a standout, but the best of a quiet run.
After Sunday, it fades. From Monday the 22nd onward, we’re back to 2ft to 3ft swells with shorter periods, dropping to 12 seconds by the end of the month. The combined energy slips back under 400, and the wind switches around, mostly onshore or cross-onshore. By Tuesday the 29th and Wednesday the 30th, it’s pretty much flat and messy.
So, what’s the takeaway? There’s no big swell coming, and the few days that could be rideable are only marginal. If you’ve got a longboard and low expectations, the mornings from the 17th through the 21st could offer a few fun little waves, especially with that offshore wind. But if you’re looking for power or size, you’ll be waiting a while.
Keep the board waxed and check back in.
Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Tue morning, min 18°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Sat afternoon, min 19°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 16 | SW 16 | SW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 163 | 157 | 157 | 475 | 339 | 366 | 284 | 272 | 405 | 303 | 303 | 299 | 379 | 375 | 375 | 522 | 522 | 499 | 553 | 618 | 521 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | on | glassy | on | on | cross-on | on | on | cross-on | on | on | glassy | cross-on | on | glassy | cross-on | cross-on | glassy |
High Tide | 11:52AM1.99m | 1:21AM1.32m | 12:26PM1.89m | 3:50AM1.22m | 1:12PM1.79m | 2:34PM1.72m | 8:13AM1.44m | 4:22PM1.72m | 7:53AM1.50m | 5:36PM1.79m | 8:00AM1.57m | 6:27PM1.89m | |||||||||
Low Tide | 7:07PM0.64m | 5:35AM1.11m | 8:21PM0.72m | 5:02AM1.22m | 10:05PM0.74m | 11:35PM0.67m | 10:10AM1.43m | 00:29AM0.57m | 11:54AM1.34m | 1:05AM0.49m | 12:40PM1.21m | 1:34AM0.42m | |||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — |
 | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:46 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 20 | 21 | 21 | 20 | 20 | 20 | 19 | 21 | 21 | 20 | 21 | 22 | 21 | 22 | 22 | 20 | 21 | 21 | 20 |
Feels °C | 20 | 20 | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 21 | 20 | 20 | 21 | 22 | 22 | 23 | 21 | 21 | 20 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 8 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 19 | SW 19 | SSW 13 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | W 6 | SW 17 | SW 17 | SW 16 |
| kJ | 74 | 76 | 35 | 475 | 339 | 366 | 284 | 272 | 405 | 303 | 303 | 139 | 379 | 375 | 375 | 522 | 522 | 84 | 553 | 618 | 521 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | W 8 | W 6 | SW 13 | SW 21 | SW 21 | SW 21 | SSW 14 | SSW 13 | SW 19 | SSW 13 | W 6 | W 6 | W 6 | W 6 | SW 17 | W 7 | W 7 | W 6 |
| kJ | 163 | 157 | 157 | 18 | 10 | 85 | 160 | 160 | 212 | 180 | 158 | 299 | 137 | 24 | 24 | 38 | 52 | 499 | 74 | 70 | 38 |
Swell 3 Height (m) Direction Period (s) | SW 12 | SSW 20 | SSW 18 | S 9 | S 9 | SSW 9 | S 8 | S 12 | NW 11 | W 5 | S 11 | W 5 | W 6 | SSW 13 | SSW 12 | SSW 12 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 11 |
| kJ | 37 | 127 | 110 | 25 | 25 | 28 | 13 | 25 | 5 | 15 | 20 | 18 | 24 | 95 | 83 | 56 | 76 | 77 | 48 | 46 | 43 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 8 | — | — | W 5 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 28 | — | — | 15 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 84 | 284 | 0 | 37 | 37 | 0 | 36 | 37 | 2 | 36 | 37 | 4 | 36 | 36 | 0 | 37 | 178 | 0 | 14 | 37 | 0 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the 15th Street Surf forecast
The above surf forecast table for 15th Street provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at 15th Street can be found by selecting the local surf guide option on the grey menu. Our 15th Street 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 (15th Street) 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 15th Street 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.
15th Street is 5 km (3 miles) from the city of Encinitas. If you plan a vacation in San Diego County, look for hotels and other accommodation in Encinitas. Encinitas has rooms for a wide range of budgets as well as car hire and transport links.
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