Surf Forecasts:
Cabo Blanco surf forecast from 21 Aug 2026:
- Best quality surf: Friday 21 Aug, 10PM (local time) - 4ft (1.2m), 11s period, SSW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 7PM (local time) - 2.5ft (0.8m), 18s period, SW swell with 379 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 10PM (local time) - 4ft (1.2m), 11s period with SSW swell.
Best Forecast Surf Conditions for Cabo Blanco this week:
The surf forecast for Cabo Blanco over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 10PM. The primary swell is predicted to be 1.2m and 11s period with a secondary swell of 0.4m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cabo Blanco in the next 16 days are 0.8m 18s and forecast to arrive on Friday (Aug 28) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (EST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 21st Aug) | 4ft (1.2m) 11s |
| Best Surf | 10PM (Fri 21st Aug) | 4ft (1.2m) 11s |
| Most Powerful | 7PM (Fri 28th Aug) | 2.5ft (0.8m) 18s |
Table - best surf conditions forecast for Cabo Blanco over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down Cabo Blanco for the next couple weeks.
First up, Friday the 21st of August. The water is 87°F – that’s much warmer than usual for this time of year. We’ve got a solid 4ft SSW groundswell with an 11-second period, and the energy is moderate at 482. The wind is glassy, dead calm. That’s a beauty of a morning session. But the afternoon goes onshore with a risk of thunderstorms, so get out early.
Saturday the 22nd is a bit smaller – 3ft S swell, 10-second period, still glassy in the morning. Energy is 367. Mornings are the only game in town.
Sunday the 23rd and Monday the 24th are small but clean. Swell drops to 2ft from the SW, but the period jumps to 19 seconds on Sunday morning – that’s a very long period groundswell. That kind of energy (418) will be a bit tricky at the beach, but Cabo Blanco can handle it. Mornings are glassy, afternoons are marginal.
Tuesday the 25th through Thursday the 27th, the mornings stay clean but the swell is small. By Thursday the 27th, the swell picks up to 5ft from the SW but with a short 7-second period, and the wind is a cross-onshore 9 mph. This is messy – poor surf conditions, energy at 445. That morning looks more like a kite-surfing setup than a paddle session.
Now, the true standout is Sunday the 30th of August. It’s a bit further out, so keep an eye on it, but it’s looking sweet. 4ft of SW groundswell with a 14-second period, and the wind is glassy from the ESE. The combined energy is strong at 709. The morning is forecast for "very good" conditions. That’s the one to get excited about.
Monday the 31st stays clean with 4ft SW swell, and Tuesday the 1st of September is another cracker: 4ft from the SSW, 14 seconds, flat calm in the morning, and strong energy at 635. Top-notch.
The rest of the first week of September keeps the pattern – mornings are clean, glassy, with swell in the 2-4ft range and long periods (13-18 seconds). The energy is moderate to strong. Afternoons are always a risk with storms, so dawn patrol is your best bet.
The best on offer is Sunday the 30th of August and Tuesday the 1st of September. Clean, glassy, good groundswell, strong energy. Crowds can be around sometimes, but that quality makes it worth it.
Long-range is promising, but not locked in yet.
Rusty out.
Short Range ForecastHeavy rain (total 31mm), heaviest during Sat afternoon. Warm (max 29°C on Fri morning, min 26°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 76mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 11 | SSW 11 | SSW 10 | S 10 | SSW 10 | SSW 10 | SW 19 | SW 18 | SSW 18 | SW 18 | SSW 17 | SW 16 | SW 16 | SSW 16 | SSW 15 | SW 15 | SSW 6 | SW 6 | SW 18 | SW 18 | SW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 446 | 430 | 265 | 204 | 160 | 150 | 184 | 168 | 216 | 155 | 202 | 274 | 129 | 171 | 158 | 106 | 90 | 88 | 106 | 109 | 142 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross | glassy | on | glassy | cross-off | cross-on | glassy | glassy | on | cross-off | glassy | cross-on | cross-off | glassy | on | glassy | glassy | on | cross-off |
High Tide | 10:24PM2.09m | 10:44AM2.26m | 11:39PM2.05m | 11:56AM2.24m | 00:52AM2.11m | 1:02PM2.31m | 1:49AM2.24m | 1:56PM2.43m | 2:34AM2.42m | 2:41PM2.56m | 3:13AM2.60m | 3:21PM2.69m | 3:48AM2.77m | ||||||||
Low Tide | 4:13PM0.89m | 4:25AM1.08m | 5:23PM0.94m | 5:38AM1.12m | 6:32PM0.90m | 6:49AM1.07m | 7:31PM0.80m | 7:47AM0.96m | 8:18PM0.67m | 8:34AM0.81m | 8:58PM0.54m | 9:15AM0.66m | 9:34PM0.43m | ||||||||
 |  |  | | | | | | |  | | | | | |  | | | | | | |
 | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — |
mm | — | 2 | 2 | 2 | 12 | 1 | 2 | 3 | 7 | 1 | 3 | 3 | 3 | 6 | 26 | — | 8 | 26 | 6 | 11 | 15 |
Temp °C | 29 | 29 | 28 | 29 | 29 | 26 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 29 | 26 | 28 | 28 | 25 | 27 | 26 | 25 |
Feels °C | 33 | 33 | 33 | 33 | 33 | 30 | 32 | 33 | 31 | 33 | 33 | 31 | 33 | 32 | 30 | 32 | 31 | 30 | 30 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 11 | SSW 10 | S 10 | SSW 10 | SSW 10 | S 9 | SSW 9 | SSW 9 | SSW 10 | S 10 | S 9 | S 9 | SSW 6 | SSW 6 | SSW 6 | SSW 15 | SW 6 | SSW 6 | SSW 6 | WSW 6 |
| kJ | 446 | 430 | 265 | 204 | 160 | 150 | 113 | 147 | 141 | 123 | 117 | 76 | 55 | 30 | 43 | 44 | 84 | 88 | 106 | 109 | 34 |
Swell 2 Height (m) Direction Period (s) | WSW 6 | WSW 6 | SW 16 | SW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 18 | SW 12 | SSW 17 | SW 16 | SW 16 | SSW 16 | SSW 15 | SW 15 | SSW 10 | S 6 | SW 18 | SW 18 | S 6 |
| kJ | 6 | 6 | 127 | 119 | 142 | 134 | 121 | 116 | 216 | 73 | 202 | 274 | 129 | 171 | 158 | 106 | 22 | 51 | 81 | 81 | 30 |
Swell 3 Height (m) Direction Period (s) | SSW 18 | SSW 18 | S 11 | SSW 21 | SW 20 | SW 20 | SW 19 | SW 18 | SSW 13 | SW 18 | SSW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 19 | SSW 14 | SW 14 | SW 15 | SW 17 |
| kJ | 30 | 30 | 38 | 44 | 61 | 60 | 184 | 168 | 114 | 155 | 57 | 36 | 36 | 30 | 30 | 30 | 15 | 81 | 51 | 76 | 142 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 6 | — | — | W 6 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 90 | — | — | 15 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 123 | 7 | 0 | 16 | 0 | 0 | 149 | 0 | 0 | 123 | 0 | 0 | 16 | 0 | 0 | 16 | 0 | 0 | 150 | 0 |
Best forecast wave conditions in Golfo Dulce | |||||||||||||||||||||
Best forecast wave conditions in Costa Rica | |||||||||||||||||||||
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Information about the Cabo Blanco Surf forecast
The above surf forecast table for Cabo Blanco provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cabo Blanco can be found by selecting the local surf guide option on the grey menu. Our Cabo Blanco 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 (Cabo Blanco) 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 Cabo Blanco 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.
Are you planning a holiday in Golfo Dulce? If you are looking for accommodation near Cabo Blanco, camping, hotels and holiday cottages in Golfo Dulce, consider staying in Golfito which is 31 km (19 miles) away. Other places in and around Golfo Dulce where you can find information about places to rent, and car hire include Puerto Armuelles which is 32 km (20 miles) away, La Concepcion, Pedregal and David.
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