Surf Forecasts:
The Tree surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 6AM (local time) - 4.5ft (1.4m), 11s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 3AM (local time) - 4.5ft (1.4m), 11s period, SSW swell with 471 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 9PM (local time) - 2.5ft (0.7m), 14s 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 Wednesday (Aug 19) at 9PM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.9m and 9s. 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 3AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 19th Aug) | 2.5ft (0.7m) 14s |
| Best Surf | 6AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
| Most Powerful | 3AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
Table - best surf conditions forecast for The Tree over the next 16 days.
The Lowdown
Alright, Rusty here, and I've been staring at the charts for our little corner of the world. Let's get into it.
This is a run of surf that's got a bit of everything, but the real standout is shaping up for the end of the month. The water's sitting at a toasty 87°F and it's a touch warmer than normal for this time of year, which is always a bonus.
Right now, we're in a bit of a quiet spell. The first real action cranks up on Wednesday morning, August 19th, at The Tree. It's an exposed spot, and it's fairly consistent. We're looking at a clean 3 ft SW groundswell with a solid 15-second period, and it's glassy as a mirror with a light NNW breeze. The combined energy is moderate (360), so it's not a massive day, but it's clean and fun. The afternoon sees a risk of thunderstorms and onshore wind, so the call is for the mornings all week.
The pattern holds through the week: clean, glassy mornings with a bit of SSW swell. Thursday morning the 20th is 3 ft of SSW swell, 9-second period, moderate energy (301), and glassy conditions. Friday morning the 21st is the pick of the early run: 4 ft of SSW swell at 11 seconds, combined energy bumping up to moderate-strong (427), and again, glassy. The mornings are the go.
The weekend of the 22nd and 23rd is more of the same, with clean, glassy starts and chest-high sets. Sunday afternoon the 23rd is interesting: the swell drops to 2 ft, but it's a long-period 18-second SW groundswell, glassy, with moderate energy (358). It's tiny, but that long period will put some shape on it.
We hit a bit of a lull through the middle of the next week. The mornings of the 24th, 25th, and 26th are all small, with the 26th seeing a 4 ft but short-period (7 seconds) SSW swell – it's gonna be a bit crumbly and weak.
Then things start to get interesting. The standout is Saturday, August 29th. The morning at The Tree is looking excellent. We've got a solid 5 ft SW groundswell with a 16-second period, combined energy is a very strong 1457, and it's clean with a light cross-offshore breeze. That's a long-period groundswell, so it will be pushing hard and will offer some proper waves. It's also a touch big for beginners, but for experienced surfers, this is the session to target. The 30th looks marginal in comparison, with a bit of cross-shore wind.
The run keeps going into the start of September. Monday morning the 31st is clean and glassy with 3 ft of 14-second SW swell and strong energy (533). The 3rd of September is a nice little bookend with a clean, glassy morning and a 2 ft SW groundswell with a very long 16-second period, moderate energy (406).
So, to sum it up: the mornings are your windows. The 29th of August is the one to circle – that's your big, clean, powerful day. Before that, the 21st and 22nd mornings are solid, everyday fun. After the 29th, the 31st and the 3rd of September are worth a paddle.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Thu afternoon. Warm (max 29°C on Thu morning, min 26°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Mon afternoon. Warm (max 29°C on Sat morning, min 26°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 15 | SW 14 | SW 14 | SSW 9 | SSW 10 | SSW 12 | SSW 11 | SSW 11 | S 11 | S 10 | S 10 | S 10 | SSW 14 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
255 | 251 | 160 | 144 | 154 | 415 | 370 | 343 | 279 | 214 | 194 | 151 | 136 | 162 | 260 | 155 | 243 | 216 | 129 | 127 | 118 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | cross-on | cross-on | glassy | cross | glassy | glassy | cross-on | glassy | glassy | glassy | cross-off | glassy | cross-on | off | glassy | glassy | cross-off |
High Tide | 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 | 12:02PM2.14m | 00:49AM2.02m | 12:57PM2.24m | 1:36AM2.18m | ||||||||
Low Tide | 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 | 5:46AM0.96m | 6:34PM0.74m | 6:46AM0.87m | 7:22PM0.62m | ||||||||
5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | |
— | 5:53 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:51 | — | — | 5:51 | — | |
mm | 1 | 4 | 2 | — | 10 | 3 | — | 3 | — | 1 | 4 | — | — | 2 | 1 | — | 7 | 6 | — | 4 | 5 |
Temp °C | 28 | 28 | 28 | 29 | 29 | 27 | 29 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 29 | 28 | 28 | 28 | 27 |
Feels °C | 32 | 32 | 33 | 33 | 32 | 31 | 33 | 32 | 33 | 33 | 33 | 33 | 33 | 33 | 30 | 32 | 33 | 33 | 33 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 12 | SSW 11 | SSW 11 | S 11 | S 10 | S 10 | S 10 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 | S 7 |
96 | 126 | 132 | 144 | 154 | 415 | 370 | 343 | 279 | 214 | 194 | 151 | 136 | 109 | 106 | 102 | 99 | 76 | 55 | 60 | 59 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 14 | SW 6 | S 12 | SW 16 | SW 14 | SW 15 | SW 14 | SSW 14 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 |
255 | 251 | 160 | 144 | 114 | 30 | 10 | 66 | 129 | 49 | 107 | 93 | 129 | 162 | 260 | 155 | 243 | 216 | 129 | 127 | 118 | |
Swell 3 Height (m) Direction Period (s) | SW 6 | W 14 | S 15 | S 13 | S 11 | SW 19 | SW 17 | SW 15 | SW 6 | WSW 6 | SW 20 | SW 20 | SW 19 | SW 13 | SW 13 | SW 12 | SW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 |
9 | 4 | 4 | 13 | 41 | 14 | 47 | 35 | 9 | 7 | 60 | 60 | 133 | 87 | 84 | 75 | 37 | 28 | 28 | 25 | 12 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 44 | 0 | 0 | 155 | 5 | 0 | 4 | 0 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 71 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Golfo de Nicoya | |||||||||||||||||||||
Best forecast wave conditions in Costa Rica | |||||||||||||||||||||
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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.











