Surf Forecasts:
Sand spit surf forecast from 12 Aug 2026:
- Best quality surf: Saturday 15 Aug, 8AM (local time) - 3.5ft (1.1m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 5AM (local time) - 3.5ft (1.1m), 17s period, SSW swell with 734 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 11PM (local time) - 2.5ft (0.7m), 16s period with SW swell.
Best Forecast Surf Conditions for Sand spit this week:
The surf forecast for Sand spit over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 11PM. The primary swell is predicted to be 0.7m and 16s period with a secondary swell of 0.8m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sand spit in the next 16 days are 1.1m 17s and forecast to arrive on Saturday (Aug 15) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 10s period and expected on Saturday (Aug 15) at 5PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 12th Aug) | 2.5ft (0.7m) 16s |
| Best Surf | 8AM (Sat 15th Aug) | 3.5ft (1.1m) 16s |
| Most Powerful | 5AM (Sat 15th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Sand spit over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer at Sand spit over the next couple of weeks.
Truth be told, it’s a pretty quiet stretch ahead. We’ve got a solid, consistent sandbar setup here, but the conditions just aren’t playing ball for most of the forecast. The water is sitting at 64°, which is a touch warmer than usual for this time of year – nothing crazy, but you’ll notice it’s slightly on the mild side.
The only real window that’s worth getting excited about is Thursday morning, the 13th of August. We’ve got a clean-looking morning with a light cross-offshore breeze from the south at 6 mph, and the swell is a modest 2ft, coming from the SW with a long-period of 16 seconds. That’s proper groundswell energy, and combined wave energy is sitting at 356 – moderate, but with that period it’ll have some push. The wind will keep things tidy, so Sand spit should offer up some fun, well-shaped waves for the intermediate crew. Crowds can pop up here sometimes, but on a Thursday morning you might find a bit of room.
After that, it’s a long stretch of mostly onshore wind and poor quality. From Thursday afternoon right through to the end of the month, the wind is locked in from the west to west-northwest, often onshore or cross-on, with speeds picking up to 12–19 mph. The swell height doesn’t really get above 3ft until the 22nd of August, but when it does, it’s short-period windswell from the WNW at only 7 seconds – that’s messy, choppy stuff, not worth paddling out for. The combined energy on the 22nd afternoon is a moderate 582, but with that period and onshore wind, it’s more of a kite-surfing setup than a surfing one.
There’s a little flicker on the morning of the 23rd of August – a 2ft SW swell with a long 19-second period, but the wind is onshore from the west at 6 mph, and the overall call is marginal. Not enough to get the heart racing.
Beyond that, the second week is just more of the same: small SW swells, onshore wind, and poor surf conditions. No standout days to circle on the calendar. Sand spit is a consistent spot, but this run is a real test of patience.
Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Wed morning, min 14°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Mon morning, min 14°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 15 | SSW 14 | NW 7 | SSW 16 | SSW 16 | NW 8 |
Wave Graph | |||||||||||||||||||||
190 | 264 | 261 | 251 | 242 | 242 | 207 | 360 | 582 | 499 | 635 | 620 | 506 | 455 | 437 | 372 | 330 | 295 | 397 | 298 | 416 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross-off | cross-on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on |
High Tide | 11:13AM1.72m | 10:20PM2.31m | 11:47AM1.79m | 11:09PM2.17m | 12:22PM1.86m | 11:59PM1.98m | 12:56PM1.90m | 00:51AM1.76m | 1:32PM1.92m | 1:49AM1.55m | 2:09PM1.91m | 3:01AM1.37m | 2:50PM1.88m | 4:45AM1.26m | |||||||
Low Tide | 4:14PM0.92m | 5:19AM0.06m | 5:08PM0.84m | 5:55AM0.21m | 6:02PM0.78m | 6:30AM0.39m | 6:58PM0.75m | 7:02AM0.60m | 7:58PM0.73m | 7:33AM0.80m | 9:04PM0.72m | 8:04AM0.98m | 10:20PM0.70m | ||||||||
6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | |
— | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 16 | 17 | 18 | 16 | 17 | 17 | 15 | 17 | 17 | 15 | 17 | 17 | 15 | 19 | 19 | 17 | 21 | 20 | 19 |
Feels °C | 18 | 18 | 16 | 16 | 17 | 15 | 16 | 14 | 13 | 16 | 14 | 13 | 15 | 14 | 13 | 17 | 16 | 15 | 18 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 15 | SSW 14 | WNW 7 | SSW 16 | SSW 16 | WNW 8 |
70 | 101 | 88 | 103 | 84 | 84 | 73 | 360 | 582 | 499 | 635 | 620 | 506 | 455 | 437 | 372 | 330 | 153 | 397 | 298 | 256 | |
Swell 2 Height (m) Direction Period (s) | SSW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | S 10 | S 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | S 10 | SSW 14 | S 10 | SSW 13 | SSW 14 |
190 | 264 | 261 | 251 | 242 | 242 | 169 | 214 | 167 | 85 | 18 | 18 | 21 | 20 | 19 | 17 | 2 | 264 | 2 | 64 | 289 | |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SSW 13 | S 11 | S 11 | S 10 | SW 20 | SSW 19 | S 9 | NW 7 | S 9 | WNW 10 | WNW 11 | S 10 | S 10 | S 10 | S 10 | S 9 | SSW 18 | S 9 | WNW 13 | WNW 15 |
46 | 98 | 37 | 37 | 33 | 98 | 207 | 15 | 27 | 28 | 10 | 22 | 18 | 8 | 8 | 8 | 2 | 32 | 2 | 17 | 21 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | WNW 8 | WNW 5 | WNW 7 | WNW 5 | WNW 6 | WNW 6 | WNW 5 | WNW 5 | WNW 6 | WNW 6 | NW 7 | WNW 7 | WNW 7 | NW 8 |
— | — | — | — | — | — | — | 66 | 17 | 46 | 46 | 51 | 36 | 44 | 46 | 58 | 139 | 295 | 186 | 263 | 416 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 175 | 137 | 0 | 0 | 165 | 8 | 103 | 137 | 13 | 137 | 137 | 13 | 137 | 116 | 13 | 116 | 165 | 13 | 107 | 116 | 13 |
Best forecast wave conditions in San Luis Obispo | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Information about the Sand spit Surf forecast
The above surf forecast table for Sand spit provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sand spit can be found by selecting the local surf guide option on the grey menu. Our Sand spit 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 (Sand spit) 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 Sand spit 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.
Sand spit is 18 km (11 miles) from Port San Luis. If you plan a vacation in San Luis Obispo, look for hotels and other accommodation in Port San Luis. Port San Luis has rooms for a wide range of budgets as well as car hire and transport links.











