Surf Forecasts:
The Tree surf forecast from 11 Sep 2026:
- Best quality surf: Friday 11 Sep, 6PM (local time) - 3.5ft (1.0m), 15s period, SW swell with glassy winds.
- Most powerful swell: Friday 11 Sep, 6PM (local time) - 3.5ft (1.0m), 15s period, SW swell with 410 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 6PM (local time) - 3.5ft (1.0m), 15s 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 Friday (Sep 11) at 6PM. The primary swell is predicted to be 1.0m and 15s period with a secondary swell of 0.8m and 7s. 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 1.0m 15s and forecast to arrive on Friday (Sep 11) at 6PM. 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+) | 6PM (Fri 11th Sep) | 3.5ft (1.0m) 15s |
| Best Surf | 6PM (Fri 11th Sep) | 3.5ft (1.0m) 15s |
| Most Powerful | 6PM (Fri 11th Sep) | 3.5ft (1.0m) 15s |
Table - best surf conditions forecast for The Tree over the next 16 days.
The Lowdown
Alright, let’s talk about what’s on offer for the next couple of weeks. The only spot lighting up is The Tree, and it’s got a stretch of clean, glassy mornings that are hard to ignore, especially for the advanced crew. The water’s sitting at 86°, which is a touch warmer than normal for this time of year.
The best of it kicks off Friday morning, 11 September. We’ve got a 4ft SW groundswell with a solid 16-second period, pushing moderate wave energy (614). It’s dead glass, not a breath of wind, which means clean, lined-up sets. This is the standout of the whole run—expect very good surf conditions. It’s a break that’s fairly consistent and exposed to SW swell, and those long periods will wrap in nicely. Crowds are possible, so keep that in mind.
Saturday morning, 12 September, sees the swell easing a touch to 3ft, still SW, period dropping to 14 seconds, but again glassy with calm conditions. Good surf, but not quite the juice of Friday.
Sunday morning, 13 September, smaller again at 2ft, but that glassy surface keeps it rideable for the advanced surfer. The swell energy is moderate (311). Monday and Tuesday mornings, 14th and 15th, offer similar small but clean waves, with glassy conditions and slow 2ft sets. The energy picks back up a bit Tuesday morning (425).
We get a nice bump Wednesday morning, 16 September—3ft SW, 16-second period, glass, and 516 energy. Very good surf conditions again. Thursday morning, 17 September, stays clean but drops a little to 3ft.
Then there’s a real quiet patch. Friday, Saturday, and Sunday mornings, 18th to 20th September, offer small glassy surf, under 3ft, but with long periods up to 21 seconds. It’s clean and could be fun for the patient surfer, but nothing punchy.
Monday morning, 21 September, is a write-off with moderate rain and 25 km/h cross-onshore wind chopping up the 3ft swell. Skip it.
Then things get interesting again. Tuesday afternoon, 22 September, swings in a spike of 7ft SW swell, but with a short 8-second period—wind’s glassy though, which is rare for a size like that. The energy is very strong (1047), and it’s marked as excellent for experienced surfers only. Over 8ft it gets expert-only, so this is right on the edge. Wednesday morning, 23 September, drops to 5ft WSW, still short period, still clean with light wind. Good for advanced surfers.
Everything after that tails off into small, clean mornings with 2 to 3ft swell through to 26 September, but nothing that’ll get your heart racing.
So, the clear standout is Friday morning, 11 September: 4ft SW, 16-second groundswell, glass, and very good conditions. Tuesday afternoon, 22 September, is the only other real spike, but it’s short-period and for experts only.
Rusty
Short Range ForecastHeavy rain (total 21mm), heaviest during Sun afternoon. Warm (max 29°C on Fri morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 546 | 427 | 346 | 346 | 245 | 176 | 140 | 131 | 234 | 127 | 192 | 252 | 192 | 358 | 310 | 371 | 353 | 214 | 248 | 245 | 203 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | glassy | cross-on | glassy | glassy | on | cross-off | glassy | cross-on | glassy | glassy | cross-on | cross-off | glassy | cross-on | off | glassy | cross-on | glassy |
High Tide | 2:52PM2.75m | 3:16AM2.91m | 3:36PM2.77m | 3:56AM2.93m | 4:17PM2.74m | 4:34AM2.89m | 4:56PM2.65m | 5:12AM2.79m | 5:35PM2.52m | 5:50AM2.64m | 6:15PM2.37m | 6:29AM2.47m | 6:56PM2.20m | ||||||||
Low Tide | 9:01PM0.12m | 9:28AM0.13m | 9:42PM0.12m | 10:10AM0.11m | 10:22PM0.17m | 10:50AM0.15m | 11:00PM0.26m | 11:29AM0.24m | 11:38PM0.39m | 12:08PM0.37m | 00:17AM0.54m | 12:50PM0.52m | 00:58AM0.70m | ||||||||
 |  |  | | |  |  | | | | |  | | | | | | | | | | |
 | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — |
 | — | 5:40 | — | — | 5:39 | — | — | 5:39 | — | — | 5:38 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — |
mm | — | 1 | 1 | — | 3 | 5 | — | 7 | 4 | 1 | 1 | — | 3 | 5 | 5 | — | 3 | 12 | — | 2 | 11 |
Temp °C | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 26 | 29 | 28 | 27 | 28 | 29 | 28 |
Feels °C | 32 | 33 | 33 | 32 | 32 | 32 | 33 | 33 | 32 | 32 | 32 | 33 | 33 | 31 | 30 | 32 | 31 | 31 | 33 | 32 | 33 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 9 | S 9 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 |
| kJ | 546 | 427 | 346 | 346 | 245 | 76 | 101 | 99 | 90 | 116 | 111 | 124 | 105 | 119 | 97 | 371 | 353 | 214 | 248 | 245 | 203 |
Swell 2 Height (m) Direction Period (s) | S 7 | S 7 | S 7 | S 8 | S 8 | SW 13 | SW 13 | SW 13 | SW 19 | SW 12 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | S 9 | S 8 | S 8 | S 9 | S 9 | S 8 |
| kJ | 48 | 68 | 51 | 42 | 64 | 176 | 140 | 108 | 234 | 73 | 192 | 252 | 192 | 358 | 310 | 94 | 66 | 63 | 81 | 76 | 66 |
Swell 3 Height (m) Direction Period (s) | S 11 | SSW 19 | S 10 | S 10 | SW 18 | SSW 18 | SW 21 | SW 19 | SW 13 | SW 19 | SW 12 | SW 12 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | S 10 | SW 22 | SW 22 | SW 21 |
| kJ | 20 | 37 | 17 | 8 | 80 | 30 | 70 | 131 | 104 | 127 | 52 | 49 | 128 | 109 | 79 | 51 | 50 | 18 | 78 | 118 | 160 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 4 | 0 | 0 | 71 | 0 | 0 | 71 | 0 | 0 | 91 | 0 | 0 | 31 | 0 | 0 | 39 | 0 | 0 | 71 | 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.
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