Surf Forecasts:
15th Street surf forecast from 17 Aug 2026:
- Best quality surf: Monday 24 Aug, 2AM (local time) - 2.5ft (0.8m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 8AM (local time) - 3ft (0.9m), 16s period, SSW swell with 402 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2AM (local time) - 3ft (0.9m), 14s 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 (Aug 18) at 2AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.9m 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 0.9m 16s and forecast to arrive on Tuesday (Aug 18) at 8AM. 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 (Tue 18th Aug) | 3ft (0.9m) 14s |
| Best Surf | 2AM (Mon 24th Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 8AM (Tue 18th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for 15th Street over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let's talk about the next couple of weeks for 15th Street. I've got the charts up, and honestly, it's a bit of a slow burn. We've got a long stretch of small, wonky surf ahead before things finally start to show some life. It's not a time to be charging, but there might be a window or two worth a paddle if you're keen.
The Pattern
Right out of the gate, we're looking at a tough run. For the first five days, from Monday the 17th through Friday the 21st, it’s basically a write-off. The waves are small, around 2ft to 3ft, with a short-period windswell that just doesn't have any push. To make matters worse, the wind is cross-onshore, making it lumpy and choppy. There's barely any energy in the water – we're talking combined swell energy readings wobbling around 200 to 400, which is weak. You'd be fighting an onshore breeze for scraps. Not worth the wetsuit, to be honest.
There’s a little breather on Sunday the 23rd when the wind drops right out and it goes glassy in the afternoon. The swell is still tiny, maybe 2ft, but it's clean. The period jumps up to 18-19 seconds, which is proper groundswell, but there's just not enough size to get excited about. It's a moment of calm in a storm of mediocrity. The week that follows, from the 24th to the 28th, is more of the same – small, weak, and mostly onshore. The energy stays low, mostly in the 200s and 300s, with a few bumps. It's a long, quiet stretch.
The Glimmer of Hope
Now, for the good stuff. Things finally start to shift as we move into the final days of August. The swell starts to build for the weekend, and while it won't be epic, it'll be the best we've seen. On the 29th, the combined energy jumps up to 761, which is moderate, and the swell is a touch bigger at 3ft. The period is hanging in the 16-17 second range, which is solid. The wind is still cross-onshore, so we won't get perfection, but there's finally some actual swell to work with.
The standout, though, looks like Monday the 31st. The morning shows a 4ft SSW groundswell with a 15-second period. It's cross-onshore, but that's fine. Still, the energy reading is a strong 660, which is the most consistent push we will have had. It should be the most powerful surf of the period, and the most fun.
The Breaks
We're focusing on 15th Street here. It's a beach and reef setup, and it can handle some swell. For this outlook, the only real standouts are those two days at the end of the month and into September. The Monday the 31st looks like the pick of the bunch. With a 4ft SSW swell and clean enough conditions, it’s a good call for a wade out. As a day to highlight, 15th Street should have some fun, rideable waves.
Also, the first of September shows some potential, with a 4ft SSW swell, but it's a bit more onshore and the period drops to 14 seconds. It's still better than what we've had, but Monday has the edge.
I know I mentioned the water is much warmer than normal for this time of year, which is a nice bonus for those early paddles.
So, there you have it. A slow first half, a cleaner but tiny pulse on the 23rd, and then a more promising weekend on the 29th and 30th, with Monday the 31st being the one to circle on the calendar. Keep your expectations in check, but there's a little something to get you out of the house.
Rusty, out.
Short Range ForecastMostly dry. Warm (max 25°C on Wed morning, min 20°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Thu morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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 14 | SSW 14 | SSW 14 | SSW 16 | SSW 17 | SSW 15 | SSW 16 | 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 |
Wave Graph | |||||||||||||||||||||
367 | 264 | 316 | 232 | 243 | 339 | 382 | 387 | 242 | 236 | 236 | 170 | 156 | 137 | 98 | 90 | 239 | 222 | 224 | 197 | 273 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | on | on | glassy | on | cross-on | cross | cross-on | cross-on | glassy | cross-on | cross-on | glassy | on | on | glassy | on | glassy | glassy |
High Tide | 1:00PM1.93m | 1:34AM1.37m | 1:40PM1.88m | 3:22AM1.21m | 2:32PM1.82m | 3:46PM1.79m | 8:25AM1.36m | 5:06PM1.82m | 8:27AM1.43m | 6:08PM1.91m | 8:41AM1.49m | 6:55PM2.01m | |||||||||
Low Tide | 7:50PM0.79m | 6:46AM0.96m | 9:14PM0.81m | 7:00AM1.12m | 10:58PM0.76m | 00:18AM0.65m | 10:08AM1.35m | 1:09AM0.54m | 11:57AM1.32m | 1:47AM0.43m | 12:51PM1.24m | 2:18AM0.34m | |||||||||
6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:25 | — | — | 7:24 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — |
Temp °C | 22 | 22 | 21 | 23 | 23 | 22 | 25 | 24 | 23 | 25 | 24 | 22 | 24 | 24 | 24 | 25 | 25 | 24 | 24 | 25 | 23 |
Feels °C | 23 | 22 | 22 | 23 | 23 | 23 | 26 | 24 | 25 | 26 | 24 | 24 | 24 | 24 | 26 | 25 | 25 | 26 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | W 6 | W 6 | W 7 | W 7 | W 7 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 14 | SSW 15 | SSW 13 | SSW 13 | SSW 14 |
367 | 264 | 54 | 51 | 70 | 70 | 79 | 387 | 242 | 236 | 236 | 170 | 156 | 137 | 98 | 90 | 239 | 222 | 137 | 135 | 273 | |
Swell 2 Height (m) Direction Period (s) | W 6 | SSW 18 | SSW 14 | SSW 16 | SSW 17 | SSW 15 | SSW 16 | W 7 | W 7 | W 6 | W 6 | W 7 | SW 18 | SSW 16 | SW 17 | SW 18 | WNW 11 | WNW 10 | SW 19 | SW 18 | SW 18 |
33 | 32 | 316 | 232 | 243 | 339 | 382 | 66 | 37 | 27 | 18 | 14 | 81 | 51 | 77 | 51 | 37 | 33 | 224 | 197 | 199 | |
Swell 3 Height (m) Direction Period (s) | S 10 | W 10 | W 10 | SSW 13 | SSW 13 | SW 19 | SW 20 | S 8 | SW 18 | SW 19 | WNW 13 | WNW 12 | W 6 | W 6 | W 6 | SSW 15 | SW 19 | SW 19 | SSW 16 | S 16 | WNW 10 |
8 | 8 | 7 | 114 | 98 | 15 | 16 | 1 | 50 | 57 | 16 | 27 | 7 | 6 | 6 | 42 | 129 | 58 | 86 | 45 | 31 | |
Wind waves Height (m) Direction Period (s) | — | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 10 | — |
— | 44 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 31 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 36 | 37 | 0 | 36 | 36 | 0 | 37 | 37 | 14 | 84 | 84 | 0 | 119 | 254 | 0 | 36 | 36 | 0 | 37 | 0 | 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.











