Surf Forecasts:
The Tree surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 9PM (local time) - 3ft (0.9m), 16s period, SW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 12AM (local time) - 4.5ft (1.4m), 11s period, SSW swell with 471 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 6AM (local time) - 2ft (0.6m), 17s period with SW swell.
Best Forecast Surf Conditions for The Tree this week:
The surf forecast for The Tree over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 6AM. The primary swell is predicted to be 0.6m and 17s period with a secondary swell of 1.0m and 8s. Another secondary swell of 0.7m and 13s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The Tree in the next 16 days are 1.4m 11s and forecast to arrive on Friday (Aug 21) at 12AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 18th Aug) | 2ft (0.6m) 17s |
| Best Surf | 9PM (Tue 18th Aug) | 3ft (0.9m) 16s |
| Most Powerful | 12AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
Table - best surf conditions forecast for The Tree over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's look at the next couple of weeks for The Tree. It's all about catching those clean morning windows, because there are some real gems in there.
We start Tuesday, August 18th, with a tiny 2ft SW groundswell and a long 13-second period. The energy is moderate (461), but the morning is dead calm – glassy as a lake. Afternoon gets a little bumpy, so be on it early. Wednesday the 19th is more of the same: a 3ft SW swell, 15-second period, and another glassy morning. This is a sweet little run of clean, small waves.
Thursday the 20th keeps it going: 3ft from the SSW with a shorter 9-second period, but the wind is light and cross-offshore, keeping it clean. The afternoon goes glassy again. Friday the 21st, we get a little bump to 4ft from the SSW with an 11-second period. Energy is moderate (468). The morning is glassy again – that's four in a row. Perfect for a longboard.
Saturday the 22nd is another glassy morning, with a 4ft S swell. Water temp is about average for the time of year.
Then we hit a lull. From Sunday the 23rd through to Thursday the 28th, it's mostly poor. Sunday morning has a tiny 1ft wave with a very long 19-second period, but it's weak. The rest of that week is plagued by small, weak swells and onshore winds. A quiet spell.
Now, the good stuff. Friday the 28th of August morning, we get a clean 2ft SW groundswell with a 15-second period and glassy conditions. A nice little session.
The true standout is Saturday the 29th of August. The morning gives us a 3ft SW swell with a very long 17-second period. The wave energy jumps to a strong (793). The winds are dead calm – glassy. This is a cracker. The swell direction (SW) is exactly what this spot wants. It's a fairly consistent break, so expect a few other folks out there for this one.
Sunday the 30th of August morning is also excellent: 4ft from the SW, 15-second period, strong energy (892), and glassy. Monday the 31st continues the trend: a 4ft SW swell, very strong energy (665), and dead calm winds. The first of September also looks clean in the morning.
So, the bottom line: the next few days are small but clean. There's a lull mid-week, but the final weekend and start of September are the real deal, especially Saturday the 29th and Sunday the 30th. Get out there.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Mon night. Warm (max 28°C on Tue morning, min 26°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 23mm), heaviest during Sun afternoon. Warm (max 29°C on Fri afternoon, min 26°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) | SW 14 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 9 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | S 11 | S 10 | S 10 | S 10 | SSW 14 | SW 18 | SW 18 |
Wave Graph  | |||||||||||||||||||
 kJ | 313 | 171 | 151 | 406 | 255 | 251 | 160 | 147 | 154 | 471 | 430 | 337 | 338 | 265 | 200 | 149 | 133 | 162 | 260 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross | glassy | glassy | cross-on | cross-off | cross-off | glassy | glassy | glassy | on | glassy | glassy | on | glassy | glassy | cross-on | glassy |
High Tide | 6:28AM2.70m | 6:50PM2.38m | 7:10AM2.53m | 7:35PM2.20m | 7:55AM2.36m | 8:25PM2.04m | 8:46AM2.21m | 9:26PM1.91m | 9:48AM2.11m | 10:37PM1.86m | 10:57AM2.09m | 11:49PM1.91m | |||||||
Low Tide | 00:13AM0.32m | 12:46PM0.40m | 00:54AM0.50m | 1:31PM0.54m | 1:38AM0.67m | 2:21PM0.69m | 2:27AM0.83m | 3:19PM0.80m | 3:26AM0.94m | 4:26PM0.85m | 4:36AM0.99m | 5:35PM0.82m | |||||||
 |  | | |  | |  | | | |  | |  | | |  | | | | |
 | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — |
 | — | — | 5:53 | — | — | 5:53 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | 5 | 3 | 2 | 3 | — | 2 | — | — | 2 | 3 | — | 4 | — | — | 2 | 1 | — | 13 | 1 |
Temp °C | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 29 | 27 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 30 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 31 | 32 | 33 | 32 | 33 | 33 | 33 | 33 | 33 | 33 |
Swell 1 Height (m) Direction Period (s) | S 7 | S 8 | S 8 | SSW 8 | S 9 | S 9 | SSW 9 | SSW 9 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | S 11 | S 10 | S 10 | S 10 | S 9 | S 9 | S 9 |
| kJ | 106 | 127 | 121 | 99 | 96 | 96 | 132 | 147 | 154 | 471 | 430 | 337 | 338 | 265 | 200 | 149 | 108 | 110 | 109 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 19 | SW 15 | S 12 | SW 16 | SW 16 | SW 15 | SW 14 | SSW 14 | SW 18 | SW 18 |
| kJ | 313 | 171 | 138 | 406 | 255 | 251 | 160 | 144 | 114 | 14 | 35 | 66 | 129 | 62 | 107 | 93 | 129 | 162 | 260 |
Swell 3 Height (m) Direction Period (s) | S 10 | SW 16 | SW 16 | S 12 | SW 6 | SW 6 | S 15 | S 13 | S 11 | SW 13 | W 13 | SW 15 | SW 22 | SW 21 | SW 20 | SW 20 | SW 19 | SW 13 | SW 13 |
| kJ | 8 | 163 | 151 | 11 | 9 | 5 | 4 | 13 | 41 | 7 | 3 | 35 | 18 | 17 | 60 | 60 | 133 | 87 | 84 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 0 | 4 | 0 | 0 | 13 | 0 | 0 | 0 | 0 | 0 | 148 | 0 | 0 | 155 | 0 | 0 | 71 | 0 |
Best forecast wave conditions in Golfo de Nicoya | |||||||||||||||||||
Best forecast wave conditions in Costa Rica | |||||||||||||||||||
Header Global | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our The Tree surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the The Tree Surf forecast
The above surf forecast table for The Tree provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Tree can be found by selecting the local surf guide option on the grey menu. Our The Tree 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 (The Tree) 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 The Tree 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 de Nicoya? If you are looking for accommodation near The Tree, camping, hotels and holiday cottages in Golfo de Nicoya, consider staying in Tejar which is 45 km (28 miles) away. Other places in and around Golfo de Nicoya where you can find information about places to rent, and car hire include San Rafael Abajo which is 45 km (28 miles) away, Esparza, Chacarita and Quepos.
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