Surf Forecasts:
Cabo Blanco surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 1AM (local time) - 3ft (0.9m), 16s period, SW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 10PM (local time) - 4.5ft (1.4m), 12s period, SSW swell with 530 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 4PM (local time) - 2.5ft (0.8m), 15s period with SW 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 Tuesday (Aug 18) at 4PM. The primary swell is predicted to be 0.8m and 15s period with a secondary swell of 0.9m and 8s. 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 1.4m 12s and forecast to arrive on Thursday (Aug 20) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (EST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Tue 18th Aug) | 2.5ft (0.8m) 15s |
| Best Surf | 1AM (Wed 19th Aug) | 3ft (0.9m) 16s |
| Most Powerful | 10PM (Thu 20th Aug) | 4.5ft (1.4m) 12s |
Table - best surf conditions forecast for Cabo Blanco over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about Cabo Blanco.
Water temp is sitting at a very warm 87°, which is way warmer than normal for this time of year – ditch the rubber.
Tuesday morning kicks off with a clean 3ft swell from the SW, glassy with a light ENE breeze. It’s not big, but it’s good quality. The swell energy is moderate at 414. The afternoon has a risk of thunderstorms.
Wednesday morning is classic: 2ft SW groundswell with a 15-second period, and flat calm – total glass. The waves will be clean, but the long period means longer waits between sets.
Thursday sees a bump: 3ft in the morning, building to 4ft by afternoon from the SSW. Both windows are glassy, so the afternoon offers more punch.
Friday morning is the first standout of the week: a clean 5ft SSW swell with a glassy surface – that’s the best of the early days.
The weekend gets messy. Saturday morning is still clean with 3ft from the S, but afternoon winds swing cross-onshore and chop it up. Sunday morning is tiny at 2ft with an 18-second period, still glassy, but the long period might make it straight. The afternoons are poor.
The middle of the week stays small with clean mornings but rotten afternoons.
The real gold is at the end. Saturday, August 29th morning shows a building 3ft SW groundswell (17 seconds), calm winds, and strong energy at 553.
Sunday, August 30th is the absolute standout. Morning delivers 4ft SW groundswell (15 seconds) with glassy conditions and strong energy at 757. This is the best on offer – solid size, clean, and powerful. Crowds can be an issue here, so get out early.
Monday, August 31st keeps it going with 5ft SSW swell and glassy morning conditions – another top session with energy at 826.
For the first week, Friday 21st morning is the pick. Long-range, Sunday 30th morning is the absolute best – bigger, cleaner, and packing serious energy.
That’s your outlook.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Thu afternoon. Warm (max 28°C on Tue morning, min 25°C on Thu afternoon). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Sun afternoon. Warm (max 29°C on Fri afternoon, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | SW 14 | SW 15 | SW 16 | SW 15 | SW 14 | SSW 10 | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | S 10 | SSW 10 | SSW 14 | SW 18 | SSW 18 | SW 18 | SSW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 288 | 258 | 362 | 217 | 214 | 163 | 166 | 334 | 512 | 455 | 447 | 270 | 204 | 196 | 154 | 121 | 168 | 216 | 155 | 202 | 278 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | on | cross-off | glassy | glassy | glassy | glassy | on | glassy | glassy | cross-on | cross | glassy | cross-on | glassy | glassy | on | cross-off |
High Tide | 7:44PM2.60m | 8:03AM2.73m | 8:30PM2.40m | 8:48AM2.53m | 9:21PM2.22m | 9:40AM2.37m | 10:24PM2.09m | 10:44AM2.26m | 11:39PM2.05m | 11:56AM2.24m | 00:52AM2.11m | 1:02PM2.31m | 1:49AM2.24m | ||||||||
Low Tide | 1:39PM0.45m | 1:48AM0.59m | 2:23PM0.61m | 2:32AM0.78m | 3:13PM0.77m | 3:23AM0.95m | 4:13PM0.89m | 4:25AM1.08m | 5:23PM0.94m | 5:38AM1.12m | 6:32PM0.90m | 6:49AM1.07m | 7:31PM0.80m | ||||||||
 | |  | | |  |  | | |  |  |  | | | | | | | | |  | |
 | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — |
mm | 1 | 1 | — | 1 | 5 | 5 | 1 | 5 | — | — | 1 | — | — | — | 1 | 2 | 7 | 3 | 1 | 11 | 23 |
Temp °C | 28 | 27 | 26 | 28 | 28 | 26 | 27 | 26 | 25 | 28 | 29 | 27 | 29 | 29 | 27 | 29 | 28 | 27 | 28 | 28 | 25 |
Feels °C | 32 | 31 | 31 | 32 | 32 | 31 | 32 | 31 | 29 | 31 | 32 | 32 | 33 | 31 | 32 | 33 | 31 | 32 | 34 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | S 10 | SSW 10 | S 9 | S 9 | S 9 | S 10 | S 10 | SW 16 |
| kJ | 123 | 99 | 137 | 129 | 143 | 163 | 166 | 334 | 512 | 455 | 447 | 270 | 204 | 196 | 154 | 113 | 113 | 85 | 89 | 90 | 278 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | S 12 | SW 19 | SSW 18 | SSW 18 | SW 16 | SW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 18 | SW 12 | SSW 17 | S 9 |
| kJ | 288 | 258 | 362 | 217 | 214 | 160 | 116 | 47 | 14 | 30 | 30 | 127 | 119 | 142 | 134 | 121 | 116 | 216 | 73 | 202 | 56 |
Swell 3 Height (m) Direction Period (s) | S 13 | S 12 | W 8 | WSW 6 | — | S 14 | S 13 | SW 18 | SW 16 | — | SW 15 | S 11 | SSW 21 | SW 20 | SW 20 | SW 19 | SW 18 | SSW 13 | SW 18 | SSW 12 | SSW 12 |
| kJ | 3 | 3 | 1 | 3 | — | 4 | 29 | 12 | 10 | — | 8 | 38 | 44 | 61 | 60 | 96 | 168 | 114 | 155 | 56 | 56 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 16 | 0 | 0 | 0 | 0 | 0 | 152 | 0 | 0 | 15 | 7 | 0 | 15 | 0 | 0 | 149 | 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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