Surf Forecasts:
Cabo Blanco surf forecast from 21 Aug 2026:
- Best quality surf: Friday 21 Aug, 7AM (local time) - 4.5ft (1.4m), 11s period, SSW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 7AM (local time) - 4.5ft (1.4m), 11s period, SSW swell with 477 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 7AM (local time) - 4.5ft (1.4m), 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 7AM. The primary swell is predicted to be 1.4m and 11s period. 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 11s and forecast to arrive on Friday (Aug 21) at 7AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (EST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
| Best Surf | 7AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
| Most Powerful | 7AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
Table - best surf conditions forecast for Cabo Blanco over the next 16 days.
The Lowdown
Alright, let’s break it down. The first surf worth paddling out for is on Friday morning, 21st August, at Cabo Blanco. It’s a fairly consistent spot, exposed to the SW. Swell is 4ft from the SSW, with a 11-second period – that’s a proper groundswell, got some push. Water temp is about normal for the time of year. The wind is dead calm, glassy – couldn’t ask for better. The combined energy is moderate at 482. This is the pick of the early window.
Friday afternoon turns ugly with a risk of thunderstorms and a 15 km/h onshore wind, so that’s it for the day. Saturday morning, 22nd, glassy again, 3ft S swell, 10-second period – smaller, but clean. Sunday morning, 23rd, drops to 2ft, but the period jumps to 19 seconds – that’s a very long period groundswell. It’s small, but those long lines will hug a point or reef nicely. The energy is moderate at 418.
From Monday 24th through Wednesday 26th, we’ve got consistent small mornings: 2ft to 2ft, all long period (15–18 seconds), glassy or calm. The afternoons are all onshore or cross-onshore, so mornings are the only window.
Thursday 27th is a mess: 6ft but only 7-second period, onshore wind at 20 km/h – that’s choppy and blown out. Not for surfing. The energy is moderate at 432, but quality is poor.
Friday 28th morning: tiny 1ft, 19-second period, glassy. Saturday 29th: 4ft SW, 17 seconds, but cross-shore wind – bumpy. The energy is strong at 870.
Now the real standout: Sunday morning, 30th August. 5ft SW swell, 16-second period, glassy, calm. The combined energy is strong at 1015. This is an excellent session for experienced surfers – that size is solid, not for beginners. The swell direction (SW) is perfect for Cabo Blanco. This is the best day of the whole forecast.
After that, Monday 31st and Tuesday 1st September ease back to 3ft to 4ft, with cross-onshore afternoons, but mornings glassy. The energy is moderate. Friday morning, 4th September, has a nice pickup: 3ft SW, 18 seconds, glassy, with energy at 802 – strong and clean. Saturday 5th September: 3ft SW, 16 seconds, glassy, energy at 684. Good finish.
Bottom line: the first week is all about small, clean, glassy mornings, with Friday 21st and Sunday 30th as the true standouts. Afternoons are mostly a write-off. Cabo Blanco can get a crowd sometimes, so get there early.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Sat afternoon. Warm (max 29°C on Fri morning, min 26°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 45mm), heaviest during Tue night. Warm (max 29°C on Mon morning, min 25°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 | S 10 | SW 19 | SW 18 | SSW 18 | SW 18 | SSW 17 | SW 16 | SW 16 | SSW 16 | SSW 15 | SW 15 | SSW 6 | SW 7 | SW 7 | SW 18 | SW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 446 | 430 | 265 | 204 | 160 | 145 | 184 | 168 | 216 | 155 | 202 | 274 | 129 | 171 | 158 | 106 | 96 | 158 | 301 | 81 | 142 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross | glassy | on | cross | glassy | on | glassy | glassy | on | cross | glassy | cross-on | cross-off | glassy | cross-on | glassy | on | cross-on | cross-off |
High Tide | 9:40AM2.37m | 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 | — | 3 | 1 | 1 | 10 | 3 | — | 6 | 8 | 1 | 4 | 5 | 2 | 7 | 15 | — | 3 | 7 | 4 | 1 | 3 |
Temp °C | 29 | 29 | 27 | 29 | 29 | 26 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 28 | 26 | 28 | 28 | 26 | 26 | 26 | 25 |
Feels °C | 33 | 32 | 32 | 33 | 33 | 29 | 33 | 33 | 32 | 33 | 32 | 31 | 31 | 31 | 30 | 33 | 32 | 31 | 29 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 11 | SSW 10 | S 10 | SSW 10 | S 10 | S 9 | SSW 9 | SSW 9 | SSW 10 | S 10 | S 9 | S 9 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | SW 7 | SW 7 | SW 7 | SW 7 |
| kJ | 446 | 430 | 265 | 204 | 160 | 145 | 113 | 147 | 144 | 123 | 90 | 76 | 55 | 47 | 56 | 68 | 96 | 158 | 301 | 67 | 88 |
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 15 | SSW 14 | SW 18 | S 7 | SW 17 |
| kJ | 6 | 6 | 127 | 119 | 142 | 134 | 121 | 116 | 216 | 73 | 202 | 274 | 129 | 171 | 158 | 106 | 84 | 81 | 81 | 56 | 142 |
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 | SSW 10 | SSW 19 | SW 14 | SW 18 | SSW 12 |
| kJ | 30 | 30 | 38 | 44 | 61 | 60 | 184 | 168 | 114 | 155 | 57 | 36 | 36 | 30 | 30 | 30 | 11 | 36 | 50 | 81 | 50 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | WNW 6 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 38 | 22 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 16 | 7 | 0 | 143 | 7 | 0 | 167 | 0 | 0 | 123 | 15 | 0 | 16 | 0 | 0 | 7 | 0 | 149 | 15 | 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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