Gi Surf Forecast

/ Santa Catarina – Sul (37 surf breaks) /

Brazil (447 surf breaks) / Lat Long: (28.44° S 48.75° W)

Surf Forecasts:

Gi surfForecast / Santa Catarina – Sul / Brazil

12 Day Weather and Surf, issued 2 pm Tuesday 16 Sep 2025 -03

Forecast update in hr min s Forecast update imminent

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

Today's Gi sea temperature is 18.5° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Gi this week:

The surf forecast for Gi over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 9PM. The primary swell is predicted to be 1.7m and 13s period with a secondary swell of 0.4m and 4s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Gi in the next 12 days are 1.9m 13s and forecast to arrive on Wednesday (Sep 17) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Friday (Sep 19) at 6AM.

Wave Type	Time (-03) & Date	Wave Height & Period
Next good surf (1 star+)	9PM (Tue 16th Sep)	5.5ft (1.7m) 13s
Best Surf	12AM (Wed 17th Sep)	6ft (1.9m) 13s
Most Powerful	12AM (Wed 17th Sep)	6ft (1.9m) 13s

Table - best surf conditions forecast for Gi over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 3mm), mostly falling on Wed morning. Warm (max 22°C on Thu morning, min 16°C on Thu night). Wind will be generally light.											Days 3-6 Weather Summary Heavy rain (total 125mm), heaviest during Sun night. Warm (max 26°C on Sat morning, min 16°C on Mon morning). Winds increasing (calm on Sat afternoon, fresh winds from the SW by Mon morning).
	Tue 16		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM
Rating (10 max)	3	4	3	2	3	4	1	3	2	0	1	2	3	2	2	1	0	0	0	0	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	ESE	ESE	ESE	ESE	E	E	E	E	ENE	E	E	E	ENE	NE	ENE	E	E	E	S	S	S
Period(s) (?)	14	13	10	10	10	10	10	10	9	8	8	9	9	9	9	9	8	9	7	8	8
Wave Graph (?)
kJ (?)	1033	1144	815	886	932	882	625	415	537	341	140	215	411	563	486	225	210	235	297	616	703
Wind (km/h)	S	WSW	ESE	ESE	E	NNE	ENE	NNE	NNE	NE	NNE	NNE	ENE	NNE	NE	ENE	NE	SW	SW	SW	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- off	on	cross- on	cross- on	glass	cross	cross- off	cross- off	cross	cross- off	cross- off	glass	cross- off	cross	cross	cross	cross	cross	cross	cross- off
High Tide / height (m)		12:23AM 0.34		3:22PM 0.45	1:00AM 0.39		3:27PM 0.45	1:33AM 0.44		3:15PM 0.46	2:11AM 0.47		3:25PM 0.47	2:55AM 0.50		3:45PM 0.48		3:37AM 0.52	4:07PM 0.48		4:12AM 0.52
Low Tide / height (m)	4:56PM 0.29		4:44AM 0.16	5:27PM 0.27		5:24AM 0.13	6:00PM 0.24		6:08AM 0.11		6:35PM 0.22	6:50AM 0.10		7:07PM 0.20	7:25AM 0.10		7:35PM 0.18	7:54AM 0.12		8:00PM 0.16	8:19AM 0.14

	Tue 16		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
Sunrise	-	-	6:11	-	-	6:09	-	-	6:07	-	-	6:07	-	-	6:05	-	-	6:05	-	-	6:03
Sunset	6:07	-	-	6:07	-	-	6:08	-	-	6:08	-	-	6:08	-	-	6:09	-	-	6:09	-	-

Rain (mm)	-	-	1	-	2	-	-	-	-	-	-	-	1	6	4	14	84	16	2	-	-
Temp. °C	20	18	20	20	19	22	21	19	22	22	23	26	23	20	20	20	20	16	15	14	15
Feels °C (?)	21	18	20	20	19	21	19	19	19	20	24	26	25	23	21	21	20	11	8	7	9

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Santa Catarina - Sul

Wind Update Continuing clean conditions at Gi (calm at Urussanga wx 55 km from Gi). A 1.9m groundswell from the ESE
40 minutes ago Gi

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Gi 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 Gi Surf forecast

The above surf forecast table for Gi provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Gi can be found by selecting the local surf guide option on the grey menu. Our Gi 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 (Gi) 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 Gi 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.

Gi is 6 km (4 miles) from Laguna. If you plan a holiday in Santa Catarina - Sul, look for hotels and other accommodation in Laguna. Laguna has rooms for a wide range of budgets as well as car hire and transport links.