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Ostional Surf Forecast
/ Guanacaste (28 surf breaks) /
Surf Forecasts:
Ostional surfForecast / Guanacaste / Costa Rica
48hr Weather and Surf, issued 11 pm Friday 29 May 2026 CSTForecast update in hr min s Forecast update imminent
Ostional surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Ostional sea temperature is
30.3° C
(Which is 1.7°C warmer than normal for this time of year)How big are the waves at Ostional today (30 May):
- Morning surf: Morning surf (30 May, local time) - 3ft (0.9m), 17s period with SSW swell.
- Afternoon surf: Afternoon surf (30 May, local time) - 3ft (0.9m), 13s period with SW swell.
- Evening surf: Evening surf (30 May, local time) - 2.5ft (0.8m), 14s period with SSW swell.
The current surf forecast for Ostional at 6AM is: 0.9m 13s primary swell from a Southwest direction (forecast issued at 11:00pm May 29). An open ocean swell of 0.7m 7s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 May) | 3ft (0.9m) | 17s |
| Afternoon (30 May) | 3ft (0.9m) | 13s |
| Evening (30 May) | 2.5ft (0.8m) | 14s |
Table - waves today at Ostional. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 26mm), heaviest during Sun afternoon. Warm (max 30°C on Sat afternoon, min 27°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 30 | Sunday 31 | Monday 1 | ||||||||||||||||||||||
9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | |
Swell Height Map |  |    |    |    | ||||||||||||||||||||
SW 14 | SW 14 | SW 14 | SW 13 | SSW 17 | SW 13 | SW 13 | SW 13 | SSW 14 | SW 21 | SW 21 | SW 20 | SW 20 | SW 20 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | |
167 | 164 | 276 | 257 | 493 | 253 | 249 | 205 | 247 | 543 | 533 | 559 | 843 | 1081 | 1210 | 1322 | 1445 | 1326 | 1516 | 1482 | 1634 | 1615 | 1579 | 1560 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | off | off | off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | glassy | cross | cross | cross | cross-off | glassy | cross-off | cross-off | glassy | cross-on | on | cross-on | |
High Tide | 1:56AM2.02m | 2:02PM2.28m | 2:37AM2.05m | 2:42PM2.30m | 3:17AM2.08m | 3:22PM2.30m | ||||||||||||||||||
Low Tide | 7:48PM0.39m | 7:51AM0.57m | 8:28PM0.34m | 8:32AM0.53m | 9:07PM0.31m | 9:12AM0.51m | ||||||||||||||||||
 |  |  |  |  | | | |  | | | | | | | | | | | | | | | | |
 | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 |
1 | — | — | — | 1 | 2 | 1 | 1 | — | 1 | 1 | — | 2 | 2 | 4 | 1 | 1 | 3 | — | — | — | 2 | 1 | 2 | |
Temp °C | 28 | 28 | 27 | 27 | 29 | 29 | 30 | 28 | 28 | 27 | 27 | 27 | 29 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 30 | 29 | 29 | 28 |
32 | 32 | 31 | 31 | 34 | 32 | 32 | 30 | 31 | 30 | 30 | 31 | 33 | 33 | 33 | 32 | 32 | 33 | 31 | 31 | 35 | 32 | 33 | 32 | |
Swell 1 Height (m) Direction Period (s) | SSW 7 | S 7 | SW 14 | SW 13 | SSW 17 | S 17 | S 17 | S 16 | S 16 | S 16 | S 16 | S 16 | S 15 | S 14 | S 14 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 |
 kJ | 49 | 47 | 276 | 257 | 493 | 596 | 572 | 539 | 427 | 847 | 836 | 942 | 446 | 713 | 703 | 1322 | 1445 | 1326 | 1516 | 1482 | 1634 | 1615 | 1579 | 1560 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | S 7 | S 7 | SW 13 | SW 13 | SW 13 | SW 13 | SSW 14 | SW 21 | SW 21 | SW 20 | SW 20 | SW 20 | SW 19 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | SSW 13 | S 13 |
| kJ | 167 | 164 | 45 | 45 | 208 | 253 | 249 | 205 | 247 | 543 | 533 | 559 | 843 | 1081 | 1210 | 593 | 585 | 460 | 434 | 427 | 350 | 350 | 277 | 255 |
Swell 3 Height (m) Direction Period (s) | S 17 | SW 12 | S 17 | S 17 | S 7 | S 7 | S 6 | SSW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SSW 13 | SW 12 | SW 12 | SW 14 | SW 14 | SW 14 | S 8 | — | — | — | — | — |
| kJ | 220 | 69 | 217 | 293 | 44 | 43 | 41 | 137 | 196 | 187 | 187 | 223 | 225 | 126 | 122 | 251 | 248 | 248 | 18 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 81 | 11 | 0 | 0 | 0 | 0 | 0 | 25 | 25 | 11 | 0 | 0 | 0 | 0 | 0 | 17 | 17 | 7 |
Best forecast wave conditions in Guanacaste | ||||||||||||||||||||||||
Best forecast wave conditions in Costa Rica | ||||||||||||||||||||||||
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