Surf Forecasts:
Guiones surf forecast from 19 Jul 2026:
- Best quality surf: Saturday 25 Jul, 12AM (local time) - 3.5ft (1.1m), 21s period, SW swell with offshore winds.
- Most powerful swell: Saturday 25 Jul, 9PM (local time) - 4.5ft (1.3m), 19s period, SW swell with 1,210 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 9PM (local time) - 3ft (0.9m), 13s period with SSW swell.
Best Forecast Surf Conditions for Guiones this week:
The surf forecast for Guiones over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 18) at 9PM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.6m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Guiones in the next 16 days are 1.3m 19s and forecast to arrive on Saturday (Jul 25) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Jul 25) at 6PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 18th Jul) | 3ft (0.9m) 13s |
| Best Surf | 12AM (Sat 25th Jul) | 3.5ft (1.1m) 21s |
| Most Powerful | 9PM (Sat 25th Jul) | 4.5ft (1.3m) 19s |
Table - best surf conditions forecast for Guiones over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about the waves in the next couple of weeks.
The water is warm, 86°, a touch warmer than usual for this time of year at Guiones. That’s a good start.
The first few days are small but clean. Saturday the 18th kicks off with a 3ft swell from the SSW, a 12-second period, and an offshore wind. The energy is weak (322), so it’s a mellow session.
Sunday the 19th morning is the pick of the early days, with a 3ft swell from the south, a 13-second period, and a cross-off wind. The energy is moderate (572). The afternoon gets a bit messy.
Monday the 20th morning is a standout early on. A 3ft swell from the SW, but the period jumps to 16 seconds, giving it proper groundswell energy. The energy is moderate (617), and the wind is offshore. It’ll be a bit racy, but the shape will be good.
We’ve got a bit of a lull from the 23rd to the 26th of July. The swell is small, but the wind is often good.
Then, from Monday the 27th of July, things get serious. A 5ft SW swell on Monday, building to 6ft on Tuesday, with a 17-19 second period. The combined energy is strong (1625 to 1766). The wind is offshore or cross-off, keeping it clean. This is expert territory.
Wednesday the 29th of July is the peak. A 5ft SW swell, 16-second period, and dead calm, glassy conditions. The energy is very strong (1252). The morning is perfect.
The best window is from Monday the 27th through Wednesday the 29th of July. Big, powerful, and clean. That’s your time.
Rusty.
Short Range ForecastHeavy rain (total 44mm), heaviest during Mon afternoon. Warm (max 31°C on Sat afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 23mm), heaviest during Tue afternoon. Warm (max 29°C on Wed morning, min 24°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sat 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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 12 | SSW 13 | S 13 | SSW 12 | SSW 12 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 26 | SSW 8 | SW 24 | SW 24 | SW 21 |
Wave Graph  | ||||||||||||||||||||
 kJ | 164 | 286 | 361 | 248 | 260 | 371 | 361 | 370 | 301 | 293 | 250 | 173 | 161 | 92 | 93 | 171 | 158 | 444 | 271 | 1015 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross | cross-off | off | cross-on | cross-off | cross-off | glassy | off | off | cross-on | cross-off | off | off | off | cross-off | glassy | off |
High Tide | 5:42PM2.22m | 6:14AM2.31m | 6:31PM2.10m | 7:01AM2.22m | 7:20PM1.95m | 7:48AM2.11m | 8:11PM1.81m | 8:37AM1.99m | 9:06PM1.69m | 9:29AM1.89m | 10:06PM1.61m | 10:26AM1.82m | 11:09PM1.58m | |||||||
Low Tide | 11:55PM0.10m | 12:28PM0.27m | 00:41AM0.23m | 1:18PM0.37m | 1:27AM0.38m | 2:10PM0.47m | 2:16AM0.51m | 3:04PM0.55m | 3:08AM0.63m | 4:03PM0.60m | 4:05AM0.70m | 5:03PM0.62m | ||||||||
 |  |  | |  | | |  |  | | | | | |  | | | | |  | |
 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — |
 | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — |
mm | 1 | 1 | — | — | — | 2 | 25 | 14 | 1 | 5 | 4 | 2 | 6 | 5 | — | — | — | 1 | 8 | 8 |
Temp °C | 31 | 26 | 28 | 29 | 27 | 28 | 25 | 25 | 28 | 27 | 26 | 29 | 28 | 26 | 29 | 28 | 26 | 29 | 29 | 26 |
Feels °C | 35 | 28 | 32 | 32 | 28 | 31 | 29 | 29 | 33 | 31 | 30 | 33 | 32 | 30 | 32 | 31 | 28 | 32 | 33 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 13 | S 13 | SSW 12 | SSW 12 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 8 | SW 8 | SW 8 | SW 21 |
| kJ | 164 | 286 | 361 | 248 | 260 | 371 | 361 | 370 | 301 | 293 | 250 | 67 | 65 | 49 | 68 | 104 | 158 | 201 | 244 | 1015 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 7 | S 6 | SSW 6 | SSW 6 | S 13 | S 12 | SSW 7 | SSW 7 | S 12 | S 7 | SW 13 | SW 13 | SW 12 | SW 12 | SW 13 | SW 13 | SW 24 | SW 24 | SW 8 |
| kJ | 146 | 43 | 41 | 57 | 47 | 212 | 190 | 70 | 47 | 137 | 51 | 173 | 161 | 92 | 93 | 59 | 59 | 444 | 271 | 100 |
Swell 3 Height (m) Direction Period (s) | S 6 | SW 19 | SW 19 | SW 18 | SW 18 | S 7 | SW 7 | S 12 | S 12 | SSW 6 | S 12 | S 11 | S 11 | SSW 11 | SSW 10 | SW 26 | SW 18 | SW 13 | SW 13 | S 7 |
| kJ | 12 | 94 | 170 | 194 | 192 | 34 | 30 | 144 | 134 | 33 | 99 | 62 | 62 | 39 | 21 | 171 | 109 | 57 | 58 | 39 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | N 5 | NNE 2 | — | — | — | — | — | NE 2 | — | — | NE 3 | — | — | — | NE 3 | — |
| kJ | — | — | — | — | 4 | 1 | — | — | — | — | — | 1 | — | — | 2 | — | — | — | 4 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 7 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Guanacaste | ||||||||||||||||||||
Best forecast wave conditions in Costa Rica | ||||||||||||||||||||
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Information about the Guiones Surf forecast
The above surf forecast table for Guiones provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Guiones can be found by selecting the local surf guide option on the grey menu. Our Guiones 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 (Guiones) 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 Guiones 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.
Guiones is 34 km (21 miles) from Nicoya. If you plan a holiday in Guanacaste, look for hotels and other accommodation in Nicoya. Nicoya has rooms for a wide range of budgets as well as car hire and transport links.
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