Surf Forecasts:
15th Street surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 2AM (local time) - 3ft (0.9m), 15s 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★+): Wednesday 19 Aug, 2AM (local time) - 3ft (0.9m), 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 Wednesday (Aug 19) at 2AM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.8m 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 cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 19th Aug) | 3ft (0.9m) 15s |
| Best Surf | 2AM (Wed 19th Aug) | 3ft (0.9m) 15s |
| 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, Rusty here. Let’s talk about the next little while at 15th Street.
It’s a bit of a slow start for paddle surfing, there's a few days of poor conditions before we get something half decent. The swell direction is mainly from the SSW, pretty average for this spot, which really wants it more from the WSW to make the most of its setup. For most of this first week, the wave heights are small, nothing much above 3ft, and with the wind mostly on it, you are fighting an uphill battle. The combined energy hovers between 201 and 475 (moderate energy), which sounds okay, but the shape is just messy. Tuesday the 18th morning has the best chance this early on with a 2ft SSW swell and a very long 16-second period – that’s proper groundswell. But the 1/10 score says it all. The tide and shape just won't come together. Forget the rest of that week, it’s a write-off.
The first true stand-out, and honestly the only one worth circling, is Saturday the 29th of August. That morning, the combined energy jumps to 816 (strong wave energy) with a 3ft SSW swell and a long 18-second period. The wind is light but cross-on, which isn't perfect, but it's manageable. The afternoon improves with the 4ft SSW swell and the combined energy hits 890, still strong. The period is still a healthy 17-seconds. This is a genuine, moderate-sized long-period groundswell; it will produce clean lines for those who know this reef setup. For beginners, the 4ft swell on Sunday the 30th morning is pushing that threshold. It feels a proper run of moderate waves.
The long-period swells here are a double-edged sword on a beach and reef setup – they’ll hold up well on the reef sections, but can close out on the sand if you are not in the right spot. The water temp is about average for this time of year, no major anomaly worth shouting about. It's been a quiet week, but trust me, that late August window looks a whole lot more interesting than anything else in this run.
Stay patient.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Wed morning, min 21°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sun morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 16 | SSW 17 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 17 | SW 18 | SSW 14 | SSW 15 | SW 19 | SW 18 | SSW 14 |
Wave Graph | |||||||||||||||||||
316 | 232 | 243 | 339 | 382 | 387 | 242 | 236 | 236 | 170 | 156 | 137 | 98 | 90 | 239 | 222 | 175 | 197 | 273 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | glassy | on | on | glassy | cross-on | on | glassy | cross-on | on | glassy | on | on | glassy | on | on | on |
High Tide | 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 | 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 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:25 | — | — | 7:24 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 23 | 23 | 22 | 24 | 24 | 22 | 24 | 24 | 22 | 24 | 24 | 23 | 26 | 25 | 24 | 27 | 25 | 23 |
Feels °C | 22 | 24 | 23 | 23 | 25 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 25 | 26 | 25 | 26 | 27 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | W 6 | W 6 | W 6 | SSW 15 | 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 |
54 | 51 | 54 | 339 | 77 | 387 | 242 | 236 | 236 | 170 | 156 | 137 | 98 | 90 | 239 | 222 | 137 | 135 | 273 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 16 | SSW 17 | W 6 | SSW 16 | W 7 | W 6 | W 6 | W 6 | W 7 | W 6 | W 6 | W 11 | W 10 | W 10 | W 10 | W 6 | SW 18 | SW 18 |
316 | 232 | 243 | 54 | 382 | 61 | 27 | 28 | 28 | 15 | 12 | 13 | 59 | 56 | 68 | 48 | 28 | 197 | 199 | |
Swell 3 Height (m) Direction Period (s) | W 10 | SSW 13 | SSW 13 | SW 19 | SW 20 | S 8 | SW 18 | SW 19 | WNW 13 | WNW 12 | SW 18 | SSW 16 | SW 17 | SW 18 | SW 19 | SW 19 | SW 19 | W 6 | W 5 |
7 | 114 | 98 | 15 | 16 | 1 | 50 | 57 | 16 | 27 | 81 | 51 | 77 | 80 | 57 | 58 | 175 | 18 | 21 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 9 | 36 | 36 | 0 | 37 | 37 | 0 | 137 | 37 | 0 | 37 | 37 | 0 | 37 | 37 | 0 | 37 | 37 | 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.











