Surf Forecasts:
15th Street surf forecast from 28 Aug 2026:
- Best quality surf: Saturday 29 Aug, 5AM (local time) - 4.5ft (1.3m), 17s period, SSW swell with glassy winds.
- Most powerful swell: Thursday 3 Sep, 8AM (local time) - 5ft (1.5m), 14s period, SSW swell with 956 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 2AM (local time) - 2.5ft (0.7m), 18s 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 Friday (Aug 28) at 2AM. The primary swell is predicted to be 0.7m and 18s period with a secondary swell of 0.9m and 10s. 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 1.5m 14s and forecast to arrive on Thursday (Sep 03) at 8AM. 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+) | 2AM (Fri 28th Aug) | 2.5ft (0.7m) 18s |
| Best Surf | 5AM (Sat 29th Aug) | 4.5ft (1.3m) 17s |
| Most Powerful | 8AM (Thu 3rd Sep) | 5ft (1.5m) 14s |
Table - best surf conditions forecast for 15th Street over the next 16 days.
The Lowdown
Alright folks, Rusty here. We’re looking at a pretty quiet stretch ahead for 15th Street (beach and reef). Honestly, the whole 16-day window is a bit of a write-off for quality waves. The water is an unusually warm 74° right now – that’s 6° above normal, very unusual for late August.
We start on Thursday, August 27th, with a weak, fading S swell at 4 ft and an 11-second period. The cross-on breeze from the SW is gonna mess up the shape. Combined swell energy is only moderate at 425, and the forecast is marginal at best. Friday, August 28th has a bigger, longer-period groundswell (SSW, 16-19 seconds), but it’s mostly small at 2-3 ft, and the cross-onshore wind keeps it messy. That longer period would normally be nice, but with these low heights and rippled surface, it’s not doing us any favors.
Saturday the 29th has a bit more size (4 ft to 4 ft) and a long 16-second period, and the wind shifts onshore from the W. Still, the combined energy climbs to a strong 884, but the surf quality is still rated as poor or marginal. Sunday the 30th is more of the same – cross-onshore mess. The early week of September brings light onshore winds and tiny swells, nothing to get excited about.
The best the forecast has to offer is hoping for a clean-up. On Tuesday, September 8th, the wind switches to a light cross-offshore breeze from the NNE, and we get clean conditions with a 3 ft, 14-second SSW groundswell. The combined energy is moderate (557) and for a moment, the surf quality is expected to be very good. But it’s tiny – only knee- to waist-high. That’s your only real shining moment, and it’s over 10 days out, so keep your expectations flexible.
The rest of the period through to September 11th is a rinse-and-repeat of small, onshore-affected slop. The best advice is to wait for the stars to align on the 8th, and even then, bring a groveler. There just isn’t much on offer.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Fri morning, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Tue night. Warm (max 25°C on Tue morning, min 20°C on Wed morning). Wind will be generally light. | |||||||||||||||||||
Thu 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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) | S 11 | SSW 18 | SW 16 | SSW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 12 | SSW 13 | S 11 | S 11 | S 12 | SSW 12 | SSW 12 | SSW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 274 | 270 | 274 | 465 | 932 | 667 | 788 | 749 | 537 | 437 | 321 | 257 | 228 | 198 | 237 | 284 | 371 | 447 | 461 | 459 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-on | cross-on | glassy | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | on | cross-on | cross-on | on | on | cross-on |
High Tide | 9:18PM2.17m | 10:16AM1.83m | 9:52PM2.09m | 10:38AM1.90m | 10:29PM1.96m | 11:03AM1.97m | 11:09PM1.79m | 11:31AM2.01m | 11:56PM1.60m | 12:05PM2.03m | 00:56AM1.39m | 12:47PM2.02m | 2:38AM1.23m | |||||||
Low Tide | 3:14PM0.84m | 3:59AM0.29m | 3:51PM0.76m | 4:22AM0.38m | 4:30PM0.69m | 4:46AM0.50m | 5:12PM0.65m | 5:09AM0.64m | 6:01PM0.64m | 5:33AM0.79m | 7:02PM0.65m | 5:57AM0.95m | 8:22PM0.65m | |||||||
 |  |  | | | | | | | | | | | |  | |  |  | |  | |
 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — |
 | 7:20 | — | — | 7:19 | — | — | 7:17 | — | — | 7:16 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 5 | — | — |
Temp °C | 25 | 24 | 27 | 26 | 25 | 27 | 26 | 24 | 24 | 24 | 22 | 23 | 23 | 22 | 25 | 24 | 24 | 23 | 24 | 23 |
Feels °C | 26 | 27 | 29 | 27 | 27 | 28 | 26 | 26 | 23 | 23 | 23 | 23 | 22 | 22 | 24 | 23 | 23 | 25 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 10 | S 9 | SSW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | W 8 | W 8 | W 8 | S 12 | S 12 | SSW 13 | S 11 | S 11 | S 12 | SSW 12 | SSW 12 | SSW 12 |
| kJ | 274 | 151 | 78 | 465 | 932 | 667 | 788 | 749 | 177 | 138 | 138 | 239 | 228 | 198 | 237 | 284 | 371 | 447 | 461 | 459 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SSW 18 | SW 16 | S 8 | S 8 | WNW 7 | WNW 7 | W 8 | SSW 15 | SSW 14 | S 13 | WNW 7 | SSW 14 | S 11 | W 6 | SW 18 | SW 18 | SW 16 | SSW 16 | SW 16 |
| kJ | 132 | 270 | 274 | 71 | 34 | 63 | 86 | 163 | 537 | 437 | 276 | 77 | 163 | 114 | 15 | 80 | 154 | 132 | 175 | 278 |
Swell 3 Height (m) Direction Period (s) | WNW 8 | SW 14 | SW 13 | SSW 13 | W 7 | SSW 8 | S 8 | S 8 | S 13 | S 12 | SSW 14 | SSW 14 | SSW 19 | W 5 | SSW 13 | W 10 | W 10 | W 5 | W 10 | W 10 |
| kJ | 19 | 153 | 85 | 118 | 25 | 21 | 10 | 11 | 89 | 113 | 321 | 257 | 35 | 20 | 120 | 2 | 2 | 11 | 8 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | — | — | WNW 5 | WNW 5 | — | WNW 4 | WNW 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 51 | — | — | 20 | 59 | — | 6 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 108 | 0 | 119 | 114 | 0 | 37 | 36 | 37 | 37 | 37 | 6 | 37 | 37 | 17 | 36 | 37 | 37 | 37 | 36 | 22 |
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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