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Surf Forecasts:

Ostional surfForecast / Guanacaste / Costa Rica

information circle48hr Weather and Surf, issued 5 pm Wednesday 01 Oct 2025 CST
Forecast 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
28.9° C
 (Which is 1.2°C warmer than normal for this time of year)

How big are the waves at Ostional today?

The current surf forecast for Ostional at 11PM is: 0.6m 12s primary swell from a South-southwest direction (forecast issued at 05:00pm October 01). An open ocean swell of 0.5m 10s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (CST) & DateWave HeightWave Period
Morning (01 Oct)--
Afternoon (01 Oct)1.5ft (0.5m)12s
Evening (01 Oct)1.5ft (0.4m)15s

Table - waves today at Ostional. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Wednesday
01
Thursday
02
Friday
03
Saturday
04
3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM
Rating
(10 max)
0
1
1
1
2
2
2
1
0
2
2
2
2
2
2
0
0
2
2
2
2
2
2
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.5
SW
0.4
SW
0.4
SW
0.6
SSW
0.8
SSW
0.8
SSW
0.9
SSW
0.5
SSW
0.9
SSW
1
SSW
1
SSW
0.6
SW
0.6
SW
1.2
SSW
1.2
SSW
0.6
SSW
1.1
SW
0.6
SSW
1.2
SW
0.5
SSW
0.6
SSW
0.7
SSW
0.7
SSW
0.9
SSW
Period(s) (?)121615129914147771413771371671918181617
Wave
Graph
(?)Metric surfscale
Energy kJ (?)73647711111311530811177103103114113127127116112191135203251329250510
Wind
(km/h)
5
SW
5
S
10
ESE
5
SE
5
ESE
5
E
5
SE
10
S
5
SSW
5
S
5
E
5
ESE
5
ENE
5
ENE
0
WSW
5
WSW
10
SW
5
SSW
5
ESE
10
E
5
ENE
10
ESE
15
SE
20
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		glassoffcross-
off		glassglassglasscrosscrossglassglassglassglassglassglasscross-
on		cross-
on		glassglassoffcross-
off		offcross-
off		cross-
off
High Tide
/ height (m)
9:42PM
1.71
10:01AM
1.86
10:51PM
1.81
11:09AM
1.93
11:50PM
1.98
Low Tide
/ height (m)
3:25PM
0.78
3:41AM
0.90
4:32PM
0.75
4:56AM
0.83
5:31PM
0.65
5:59AM
0.68
Wednesday
01
Thursday
02
Friday
03
Saturday
04
Sunrise-----5:31-------5:31-------5:31--
Sunset5:32-------5:32-------5:31-------
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
part cloud
thunderstorm
Rain (mm)
3542---122311--22243---2
Temp. °C272726262625272727272626252527272727252524242728
Feels °C (?)313230303129313031323130292932313132292927273029
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Guanacaste

  1. weather stationWind Update Continuing clean conditions at Ostional (light winds from the E at Liberia/Tomas Guardia Airport 66 km from Ostional). 0.4m 12s groundswell from the SW with a 0.3m 12s groundswell from the SSW. 2 swells combining to make bigger set waves.

    2 hours 28 minutes ago Ostional
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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.

View detailed surf forecast for Ostional at:
surf-forecast.com

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