
Surf Forecasts:
Jaco Beach surf forecast from 16 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 9AM (local time) - 3ft (0.9m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 20 Sep, 12PM (local time) - 2.5ft (0.8m), 19s period, SW swell with 526 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 6AM (local time) - 2.5ft (0.8m), 16s period with SW swell.
Best Forecast Surf Conditions for Jaco Beach this week:
The surf forecast for Jaco Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 16) at 6AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.8m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Jaco Beach in the next 16 days are 0.8m 19s and forecast to arrive on Sunday (Sep 20) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Sep 21) at 3AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 16th Sep) | 2.5ft (0.8m) 16s |
| Best Surf | 9AM (Wed 16th Sep) | 3ft (0.9m) 16s |
| Most Powerful | 12PM (Sun 20th Sep) | 2.5ft (0.8m) 19s |
Table - best surf conditions forecast for Jaco Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here with the long-range look for Jaco Beach. We've got a bit of a slow start, but once it gets going, there are some real windows of opportunity to get the good stuff.
The overall pattern is one of gentle, clean swells building into a period with more size and energy, though conditions will get a bit dicey at times. The water temperature is sitting at 86° which is a touch warmer than normal for this time of year, so you won't need much rubber.
The first real recommendation is for the morning of Wednesday the 16th. We're looking at a 3ft swell rolling in from the SW, and with a clean cross-offshore breeze from the NE, the waves should be well-shaped. The combined swell energy is moderate at 514, and with a long 16 second period, that's a proper groundswell. This is a good one to get your eye on.
Thursday the 17th has a glassy morning with the same 3ft SW swell, but the energy dips a bit to 413. It's clean, but the period has dropped to a still-respectable 14 seconds. It'll be fun but not as lively.
Keep an eye on the morning of Sunday the 20th. The swell is back up to 3ft from the SW, but the energy has jumped to a solid 545. The cross-offshore breeze will have it looking clean. The energy gets even stronger on Monday the 21st, hitting 634 and then 649 in the afternoon. With glassy conditions and a consistent 3ft SW swell at 18 seconds, that Monday is shaping up to be the first real standout of the window. It's a long period groundswell, which at a beach break like Jaco can be a bit straight, but with the offshore winds it should still be plenty fun for those who know the bank.
The following weekend is where things get interesting, but it’s a mixed bag. On Thursday the 24th, the afternoon session gets a boost in size. While the morning is a clean 2ft from the SW, the afternoon sees a jump to 6ft from the S. The period is short at 7 seconds, but the wind stays clean and cross-offshore. The combined energy is a strong 632. This is a point where the size makes it a bit more for the experienced crew, as it's over 5ft.
Friday the 25th keeps that size going with a 6ft SW swell in the morning and 5ft in the afternoon, but the period is still short at 8 seconds. The wind stays clean, making it another session for the more confident surfer. You'll need to know your reefs and banks here.
The true standout, and the one to get excited about, is the morning of Sunday the 27th. The swell is 4ft from the SW, with a period of 13 seconds. The glassy conditions are a major positive, and the combined swell energy is a very strong 924. That’s a lot of water moving around. It'll be solid and clean for those who can handle it.
The final days of the forecast have some more promise. The morning of Tuesday the 30th is looking good with a 3ft SSW swell, a long 14 second period, and 870 of combined energy under clean winds. That’s a fine way to finish the run.
So, for the best on offer, Monday the 21st is your top pick for a classic, clean, manageable swell with glassy conditions. But if you've got the skills, Sunday the 27th is the one with real power.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu night. Warm (max 29°C on Wed morning, min 26°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 38mm), heaviest during Sun night. Warm (max 29°C on Fri afternoon, min 25°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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 17 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 20 | SW 20 | SW 19 | SW 19 | SW 21 | SW 18 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 16 |
Wave Graph | ||||||||||||||||||||
358 | 310 | 371 | 353 | 251 | 248 | 297 | 238 | 145 | 138 | 184 | 181 | 220 | 269 | 446 | 520 | 370 | 516 | 510 | 375 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | glassy | glassy | cross-on | cross-on | glassy | cross-on | glassy | glassy | cross-on | glassy | cross-off | cross-off | off | glassy | glassy | off |
High Tide | 5:35PM2.52m | 5:50AM2.64m | 6:15PM2.37m | 6:29AM2.47m | 6:56PM2.20m | 7:12AM2.31m | 7:44PM2.04m | 8:02AM2.15m | 8:44PM1.92m | 9:04AM2.05m | 9:57PM1.87m | 10:17AM2.01m | 11:12PM1.93m | |||||||
Low Tide | 11:38PM0.39m | 12:08PM0.37m | 00:17AM0.54m | 12:50PM0.52m | 00:58AM0.70m | 1:36PM0.68m | 1:46AM0.86m | 2:32PM0.81m | 2:46AM0.98m | 3:40PM0.88m | 4:00AM1.03m | 4:52PM0.87m | ||||||||
— | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | |
5:38 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:36 | — | — | 5:35 | — | — | 5:35 | — | |
mm | 2 | 1 | — | 2 | — | — | 3 | 6 | — | 1 | 2 | — | 2 | 14 | 1 | 4 | 14 | — | — | 9 |
Temp °C | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 25 | 27 | 27 | 27 |
Feels °C | 32 | 33 | 32 | 32 | 33 | 32 | 32 | 31 | 31 | 32 | 33 | 32 | 32 | 33 | 32 | 31 | 28 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | S 9 | S 9 | S 7 | S 6 | SW 18 | SW 19 | SW 19 | SW 18 | SW 18 | S 7 | S 7 |
108 | 88 | 371 | 353 | 251 | 248 | 297 | 238 | 138 | 56 | 55 | 45 | 41 | 269 | 446 | 520 | 370 | 516 | 91 | 86 | |
Swell 2 Height (m) Direction Period (s) | SW 17 | SW 16 | S 8 | S 8 | S 8 | S 9 | S 9 | S 8 | S 8 | SW 13 | SW 13 | SW 13 | SW 13 | S 6 | SSW 6 | SSW 6 | S 6 | S 7 | SW 18 | SW 16 |
358 | 310 | 92 | 68 | 50 | 87 | 78 | 52 | 52 | 138 | 138 | 136 | 134 | 30 | 28 | 28 | 39 | 57 | 510 | 375 | |
Swell 3 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | SW 22 | SW 22 | SW 21 | SW 20 | SW 20 | SW 19 | SW 19 | SW 21 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SSW 11 | SSW 11 |
109 | 79 | 51 | 50 | 19 | 78 | 118 | 160 | 145 | 136 | 184 | 181 | 220 | 72 | 71 | 69 | 68 | 61 | 48 | 47 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 3 | 1 | 0 | 36 | 0 | 0 | 198 | 1 | 0 | 58 | 0 | 0 | 58 | 0 | 0 | 0 | 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 Jaco Beach Surf forecast
The above surf forecast table for Jaco Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Jaco Beach can be found by selecting the local surf guide option on the grey menu. Our Jaco Beach 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 (Jaco Beach) 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 Jaco Beach 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 Jaco Beach, camping, hotels and holiday cottages in Golfo de Nicoya, consider staying in Esparza which is 43 km (27 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, Tejar, Chacarita and Puntarenas.










