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Ostional Surf Forecast
/ Guanacaste (28 surf breaks) /
Ostional surfForecast / Guanacaste / Costa Rica
12 Day Weather and Surf, issued 11 pm Monday 23 Jun 2025 CST
Best Forecast Surf Conditions for Ostional this week:
The surf forecast for Ostional over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jun 24) at 6AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.6m and 7s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ostional in the next 12 days are 0.8m 16s and forecast to arrive on Thursday (Jun 26) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 10s period and expected on Tuesday (Jul 01) at 3AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 24th Jun) | 2ft (0.6m) 13s |
| Best Surf | 9PM (Thu 26th Jun) | 2.5ft (0.7m) 16s |
| Most Powerful | 3PM (Thu 26th Jun) | 2.5ft (0.8m) 16s |
Table - best surf conditions forecast for Ostional over the next 12 days.
Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | Sunday 29 | Monday 30 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Sat 05 | |||||||||||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 14 | 13 | 13 | 13 | 12 | 19 | 18 | 17 | 16 | 16 | 15 | 15 | 14 | 13 | 14 | 13 | 13 | 13 | 12 | 6 | 6 | 8 | 7 | 16 | 17 | 18 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 203 | 180 | 153 | 130 | 119 | 298 | 264 | 457 | 518 | 454 | 403 | 321 | 260 | 154 | 175 | 143 | 85 | 78 | 73 | 20 | 20 | 33 | 17 | 165 | 142 | 192 | 656 | 499 | 1071 | 976 | 716 | 598 | 585 | 426 | 314 | 292 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | glass | glass | glass | cross- on | glass | glass | on | glass | cross- off | glass | glass | glass | on | cross- off | cross | glass | cross- off | cross- off | cross- off | off | off | glass | glass | glass | glass | off | glass | glass | off | cross- off | cross- off | cross- off | cross- off | glass |
High Tide / height (m) | 1:06AM 2.16 | 1:24PM 2.55 | 2:03AM 2.25 | 2:19PM 2.59 | 2:58AM 2.32 | 3:12PM 2.59 | 3:50AM 2.38 | 4:03PM 2.55 | 4:40AM 2.40 | 4:51PM 2.48 | 5:28AM 2.39 | 5:39PM 2.37 | 6:15AM 2.36 | 6:26PM 2.24 | 7:01AM 2.30 | 7:13PM 2.11 | 7:46AM 2.23 | 8:02PM 1.98 | 8:33AM 2.15 | 8:54PM 1.86 | 9:22AM 2.09 | 9:50PM 1.79 | 10:13AM 2.05 | |||||||||||||
Low Tide / height (m) | 7:04AM 0.35 | 7:52PM 0.12 | 8:03AM 0.29 | 8:45PM 0.05 | 8:58AM 0.25 | 9:36PM 0.02 | 9:51AM 0.25 | 10:24PM 0.04 | 10:43AM 0.29 | 11:11PM 0.10 | 11:33AM 0.35 | 11:56PM 0.19 | 12:23PM 0.44 | 12:41AM 0.31 | 1:13PM 0.53 | 1:25AM 0.44 | 2:04PM 0.61 | 2:10AM 0.57 | 2:56PM 0.67 | 2:58AM 0.68 | 3:51PM 0.70 | 3:50AM 0.75 | 4:48PM 0.69 | |||||||||||||
Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | Sunday 29 | Monday 30 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Sat 05 | |||||||||||||||||||||||||
| Sunrise | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:24 | - | - | 5:26 | - | - | 5:26 | - | - | 5:26 | - |
| Sunset | - | - | 6:06 | - | - | 6:06 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 |
 |  |  |  |  |  | | | | | | |  | | | | | | | | | | |  |  | | | | | | | |  | | | | |
Rain (mm) | 14 | 1 | 7 | - | - | 2 | 10 | 5 | 5 | 7 | 2 | 3 | 7 | 7 | 4 | 9 | - | 7 | 7 | 2 | 11 | 5 | 1 | - | - | - | 8 | 7 | 2 | 11 | 5 | 8 | 32 | 1 | - | 3 |
| Temp. °C | 25 | 27 | 27 | 25 | 28 | 28 | 26 | 27 | 27 | 26 | 26 | 27 | 26 | 27 | 28 | 25 | 29 | 29 | 26 | 28 | 28 | 26 | 28 | 28 | 25 | 28 | 27 | 25 | 27 | 27 | 26 | 26 | 23 | 24 | 29 | 29 |
| Feels °C (?) | 29 | 31 | 32 | 28 | 31 | 31 | 30 | 31 | 30 | 31 | 30 | 32 | 30 | 31 | 32 | 29 | 33 | 34 | 30 | 32 | 32 | 30 | 32 | 32 | 28 | 32 | 32 | 28 | 31 | 32 | 30 | 28 | 25 | 27 | 33 | 33 |
Short Range Forecast: Heavy rain (total 44mm), heaviest during Mon night. Warm (max 28°C on Wed morning, min 24°C on Mon night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 46mm), heaviest during Sat night. Warm (max 29°C on Sun morning, min 24°C on Fri night). Wind will be generally light. | Days 6-9 Weather Summary Heavy rain (total 34mm), heaviest during Mon afternoon. Warm (max 28°C on Mon morning, min 25°C on Mon night). Wind will be generally light. | Long Range Forecast: Heavy rain (total 72mm), heaviest during Fri afternoon. Warm (max 29°C on Sat morning, min 23°C on Fri afternoon). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ostional 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 Ostional Surf forecast
The above surf forecast table for Ostional provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Ostional can be found by selecting the local surf guide option on the grey menu. Our Ostional 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 (Ostional) 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 Ostional 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.
Ostional is 35 km (22 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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