Guiones Surf Break

Lat Long: 9.93° N 85.67° W

Guiones Surf Forecast and Surf Report

Issued: 11 am 27 Jul 2026 (local time)

Forecast update in  hr  min

Today's Guiones sea temperature is
29.8° C
1.8° 

Guiones surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Guiones surf forecast from 27 Jul 2026:

  • Best quality surf: Monday 27 Jul, 9PM (local time) - 5ft (1.6m), 17s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 28 Jul, 9AM (local time) - 5.5ft (1.7m), 18s period, SW swell with 1,741 kJ wave energy.
  • Next surfable swell (1★+): Monday 27 Jul, 9PM (local time) - 5ft (1.6m), 17s period with SW 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 Monday (Jul 27) at 9PM. The primary swell is predicted to be 1.6m and 17s period with a secondary swell of 0.5m and 9s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Guiones in the next 16 days are 1.7m 18s and forecast to arrive on Tuesday (Jul 28) at 9AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 27th Jul)5ft (1.6m) 17s
Best Surf 9PM (Mon 27th Jul)5ft (1.6m) 17s
Most Powerful 9AM (Tue 28th Jul)5.5ft (1.7m) 18s

Table - best surf conditions forecast for Guiones over the next 16 days.


The Lowdown

G’day, Rusty here. Alright, let’s talk about what’s shaping up for Guiones. The next 16 days are packed with activity, so we’ve got a lot to run through. We kick off on Monday the 27th of July with a nice pulse of long-period SW groundswell. The water’s sitting at 86°, which is a touch warmer than normal for this time of year – feels like a bath, but in a good way.

Monday 27th July sees a 4ft SW swell rolling in with a very long 19-second period. That’s groundswell with serious energy – the combined energy is 1403, so it’s strong. The morning is the pick with a light offshore breeze from the ENE. It’ll be clean. This is the standout of the whole forecast. The direction is WNW for optimum, and we’re getting SW, which is angled enough to work. For experienced surfers, this is the time to be in the water. The afternoon turns cross-shore from the south, making it a bit crumbly.

Tuesday 28th July picks up to 6ft, same SW direction. The period drops to 18 seconds, still long. The morning is glassy – dead calm with the ENE breeze barely a whisper. That’s a major positive. The wave energy is pumping at 1829, so there’s grunt. This wave is over 5ft, so it’s stepping into intermediate-to-expert territory. The afternoon gets a cross-on breeze from the SSW, not as good.

Wednesday 29th July drops just a touch to 5ft, 16-second period. Wednesday morning is glassy again, with that ENE breeze going completely still – sensational. Energy is 1250, still very strong. The afternoon gets onshore from the WSW, so the windows are definitely the mornings.

Thursday 30th July sees the swell drop to 4ft, 14-second period, still decent quality. The morning is clean with a light offshore ENE breeze. Energy is 699. It’s good, but dropping.

Friday 31st July moves into smaller 3ft swell, 14-second period. The morning is glassy and nice. Expect clean lines but mellow power. The afternoon brings a risk of thunderstorms and a cross-on breeze – not worth the paddle.

We then hit a quiet spell. From Saturday 1st August through to Wednesday 5th August, the waves are tiny – 3ft down to 1ft – and the energy drops into the 200s and 100s. The mornings are mostly clean with offshore breezes, but there’s just not enough push for a decent ride. There’s a gap of several days where the surf is below par for experienced surfers. Beginners might find some little rollers on the 3rd of August (3ft, glassy, but weak).

Thursday 6th August is still small, but we get a short period 8-second S swell at 2ft. Not worth getting excited about.

Friday 7th August is the first sign of a return. A 2ft SW swell but with an 18-second period – that’s very long period groundswell. Energy jumps back to 495. The morning is clean with a light offshore NE breeze. The wave size is small, but that period will bring some tidy lines through the banks.

Saturday 8th August through Tuesday 11th August keeps a consistent 2ft to 3ft SW and S swell, with periods ranging from 11 to 19 seconds. The mornings are all clean with offshore breezes. The energy stays in the 400 to 500 range, so it’s moderate. By Monday 10th and Tuesday 11th August, the swell direction shifts to S and the period is solid – 11 to 16 seconds. Good for a longboard or a fun shape.

For the standout, it has to be Monday 27th July morning and Tuesday 28th July morning. Those glassy conditions, strong SW groundswell, and long periods will give you the best waves of the whole run. The longer period on the 27th (19 seconds) will see gaps between sets, making paddling easier for those who can handle the size. Remember, this is a consistent break but can get crowded often – so expect company on those clean mornings.

All in all, mornings are the game here. The afternoons are mostly a write-off with cross-onshore or onshore breezes.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Mon afternoon. Warm (max 30°C on Mon afternoon, min 25°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 37mm), heaviest during Sat night. Warm (max 30°C on Thu morning, min 24°C on Sat night). Wind will be generally light.

Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
4
2
4
4
3
3
3
1
3
2
0
2
2
1
1
2
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SW
19
1.1
SW
19
1.4
SW
18
1.7
SW
18
1.7
SW
17
1.6
SW
16
1.6
SW
16
1.6
SW
16
1.4
SW
15
1.3
SW
14
1.2
SW
14
1.1
SW
14
1
SW
14
1
SW
13
1
SW
13
0.9
SW
13
0.9
SW
13
0.7
SW
12
0.6
SW
15
0.6
SW
15
0.6
SW
14
Wave Graph
Metric surfscale
Energy kJ
791
800
1213
1741
1682
1330
1194
1164
856
667
589
485
357
342
326
238
234
147
137
171
167
Wind (km/h)
10
ENE
10
S
5
E
5
NE
10
SSW
5
NNE
5
ENE
10
WSW
10
NNE
5
ENE
10
S
10
NE
5
E
10
S
5
NNE
10
SE
10
SSW
10
SSE
10
NNW
10
W
5
NE
Wind State
off
cross
glassy
glassy
cross-on
glassy
glassy
on
cross-off
off
cross-on
off
glassy
cross-on
cross-off
cross-off
cross-on
cross
cross-off
cross-on
glassy
High Tide
1:13PM1.90m
1:53AM1.74m
1:59PM1.96m
2:35AM1.84m
2:41PM2.03m
3:15AM1.94m
3:20PM2.07m
3:51AM2.03m
3:57PM2.09m
4:26AM2.10m
4:34PM2.08m
5:01AM2.14m
5:11PM2.05m
Low Tide
7:42PM0.46m
7:48AM0.60m
8:24PM0.38m
8:32AM0.53m
9:02PM0.32m
9:13AM0.47m
9:37PM0.28m
9:52AM0.43m
10:11PM0.26m
10:30AM0.40m
10:45PM0.26m
11:08AM0.38m
11:19PM0.28m
clear
rain showers
clear
clear
clear
clear
clear
thunderstorm
clear
clear
part cloud
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
thunderstorm
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:31
5:31
5:31
5:31
5:31
5:31
5:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:06
6:06
6:06
6:05
6:05
6:05
 mm
1
1
1
2
6
6
1
21
4
Temp °C
29
30
27
29
29
27
28
29
27
30
29
28
29
29
28
29
28
27
28
27
26
Feels °C
31
32
30
31
32
31
32
33
31
33
32
32
33
32
33
32
31
32
32
31
31
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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