Surf Forecasts:
15th Street surf forecast from 20 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 25 Aug, 2AM (local time) - 2.5ft (0.8m), 17s period, SW swell with 330 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 2AM (local time) - 2.5ft (0.8m), 15s 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 Thursday (Aug 20) at 2AM. The primary swell is predicted to be 0.8m and 15s 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 15th Street in the next 16 days are 0.8m 17s and forecast to arrive on Tuesday (Aug 25) at 2AM. 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 (Thu 20th Aug) | 2.5ft (0.8m) 15s |
| Best Surf | 5AM (Mon 24th Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 2AM (Tue 25th Aug) | 2.5ft (0.8m) 17s |
Table - best surf conditions forecast for 15th Street over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for 15th Street. Gotta be straight with you – this stretch of the forecast is a real test of patience. The first decent chance doesn’t even pop up until the middle of next week, so we’re looking at a solid gap of quiet days right now.
The first real glimmer of hope comes on Wednesday afternoon, August 19th. We’re looking at a small 3ft swell coming from the SSW with a 16-second period. That’s proper groundswell energy, but the wave comment says it all: “poor surf conditions.” The wind is light and offshore, which is a good look, but the swell just isn’t doing the job. The combined energy reading is 448 (moderate), but it’s not translating into anything rideable. The water is 71°, which is a touch warmer than normal for this time of year.
Honestly, from there we slide into a string of days where the swell stays tiny – between 2ft and 3ft – and the wind stays mostly cross-on or on. The period drops to 13-14 seconds, and the energy levels are all in the moderate range (174 to 467). It’s all rated as “poor surf” or “marginal” at best. Nothing to get excited about.
The real standout, the one that makes this whole outlook worth reading, is the very last entry. On Thursday afternoon, September 3rd, we get a proper shift. The wind goes glassy – calm, with no wind at all – and the swell is a clean 3ft from the SSE, with a 14-second period. The combined energy reading hits 593 (moderate), and the wave comment says “expect very good surf conditions.” This is the one. Clean, glassy, and a little punchy for a beach and reef setup. That’s the best on offer.
The day before that, Thursday morning, September 3rd, is also worth a mention. It’s got a 3ft SSE swell with a 14-second period (energy at 550), and the wind is offshore. It’s only rated as “marginal,” but it’s a step up from the rest of the week.
For the rest of the run, it’s a long grind. From August 20th through to September 2nd, we’re talking mostly tiny, weak swells with cross-on or onshore winds. The energy is moderate, but the quality is poor. The swell stays under 3ft most of the time, and the periods are short to moderate. It’s a classic case of waiting for the next system to push through.
So, to sum it up: the first week is a bust. The second week builds slowly, and the real payoff is that glassy, clean afternoon on Thursday, September 3rd. That’s your window. The rest is just waiting and watching.
Stay patient, and keep your eye on that glass-off.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat morning, min 21°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Sat afternoon, min 22°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 17 | SSW 13 | SSW 14 | SSW 15 | SW 19 | SW 18 | SSW 14 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph | ||||||||||||||||||||
387 | 242 | 239 | 236 | 170 | 156 | 137 | 98 | 90 | 239 | 222 | 224 | 197 | 273 | 194 | 177 | 330 | 264 | 208 | 203 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | cross-on | cross-on | glassy | cross-on | on | glassy | on | on | glassy | on | on | cross-on | on | on | glassy | on | on | cross-on |
High Tide | 2:32PM1.82m | 3:46PM1.79m | 8:25AM1.36m | 5:06PM1.82m | 8:27AM1.43m | 6:08PM1.91m | 8:41AM1.49m | 6:55PM2.01m | 8:57AM1.55m | 7:34PM2.10m | 9:15AM1.61m | 8:10PM2.17m | ||||||||
Low Tide | 10:58PM0.76m | 00:18AM0.65m | 10:08AM1.35m | 1:09AM0.54m | 11:57AM1.32m | 1:47AM0.43m | 12:51PM1.24m | 2:18AM0.34m | 1:30PM1.14m | 2:45AM0.28m | 2:05PM1.04m | 3:11AM0.24m | ||||||||
— | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | |
7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:25 | — | — | 7:24 | — | — | 7:23 | — | — | 7:22 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 22 | 23 | 23 | 22 | 24 | 24 | 22 | 25 | 25 | 23 | 25 | 24 | 23 | 25 | 25 | 22 | 24 | 24 | 23 |
Feels °C | 23 | 24 | 24 | 23 | 24 | 25 | 24 | 24 | 26 | 25 | 24 | 25 | 24 | 25 | 25 | 25 | 23 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | W 6 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | W 7 | SSW 14 | SSW 15 | W 6 | W 6 | SSW 14 | W 6 | SW 17 | W 6 | SW 16 | SW 16 | W 6 |
387 | 35 | 239 | 236 | 170 | 156 | 137 | 98 | 33 | 239 | 222 | 54 | 38 | 273 | 24 | 177 | 54 | 264 | 208 | 78 | |
Swell 2 Height (m) Direction Period (s) | W 7 | SSW 15 | W 6 | W 6 | W 6 | W 7 | W 6 | W 6 | SSW 13 | W 6 | W 6 | SSW 13 | SSW 13 | W 6 | SW 18 | SSW 13 | SW 17 | S 13 | S 13 | S 13 |
57 | 242 | 38 | 28 | 19 | 32 | 20 | 11 | 90 | 29 | 25 | 98 | 135 | 22 | 194 | 93 | 330 | 126 | 87 | 163 | |
Swell 3 Height (m) Direction Period (s) | W 14 | SW 18 | SW 19 | WNW 13 | WNW 12 | SW 18 | SSW 16 | SW 17 | SW 18 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SSW 12 | S 15 | S 13 | S 10 | S 10 | SW 16 |
4 | 50 | 57 | 16 | 28 | 81 | 51 | 77 | 51 | 57 | 58 | 224 | 197 | 199 | 87 | 38 | 126 | 9 | 7 | 203 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | — | WNW 6 | W 6 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 32 | — | 68 | 81 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 37 | 0 | 137 | 37 | 0 | 119 | 37 | 0 | 37 | 36 | 0 | 37 | 36 | 36 | 36 | 36 | 0 | 37 | 36 | 36 |
Best forecast wave conditions in San Diego County | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











