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Surf Forecasts:

Lighthouse-Southside surfForecast / Rhode Island / USA

information circle12 Day Weather and Surf, issued 1 pm Thursday 18 Sep 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Lighthouse-Southside surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Lighthouse-Southside sea temperature is
19.9° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Lighthouse-Southside this week:

The surf forecast for Lighthouse-Southside over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 21) at 8AM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.3m and 9s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Lighthouse-Southside in the next 12 days are 1.1m 10s and forecast to arrive on Monday (Sep 22) at 11AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Saturday (Sep 20) at 8AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sun 21st Sep)1.5ft (0.4m) 13s
Best Surf11AM (Mon 22nd Sep)3.5ft (1.1m) 10s
Most Powerful11AM (Mon 22nd Sep)3.5ft (1.1m) 10s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Mostly dry. Warm (max 25°C on Fri afternoon, min 14°C on Sun morning). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 22°C on Tue afternoon, min 13°C on Mon morning). Wind will be generally light.

Thu
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
1
2
0
0
0
0
0
0
1
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.7
SE
0.6
SE
0.4
SE
0.4
SE
0.3
SE
0.3
SE
0.3
SE
0.3
SE
0.4
SE
0.5
SE
0.6
SSE
1.1
SE
1.1
SE
0.8
SE
0.8
SE
0.9
SE
0.9
SE
0.9
SE
0.9
SE
0.8
SE
0.6
SE
Period(s) (?)7777999913121110981091010998
Wave
Graph
(?)Metric surfscale
Energy kJ (?)4942131213121212447284255188771301381601541239143
Wind
(km/h)
15
SW
20
W
5
WNW
15
W
25
NNE
20
ENE
20
SE
10
ESE
20
E
15
ESE
10
ESE
10
ENE
5
S
15
WSW
20
SW
25
SW
15
W
5
W
15
NNE
20
NNE
15
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on		glasscross-
on		cross-
off		offcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
on		onononcross-
on		cross-
on		offcross-
off		off
High Tide
/ height (m)
6:08PM
1.05
6:31AM
0.99
6:54PM
1.06
7:15AM
1.05
7:36PM
1.06
7:56AM
1.10
8:15PM
1.05
8:34AM
1.12
8:52PM
1.02
9:12AM
1.11
9:29PM
0.98
9:50AM
1.08
10:06PM
0.92
10:28AM
1.04
Low Tide
/ height (m)
12:53AM
0.01
1:05PM
-0.02
1:30AM
-0.02
1:47PM
-0.04
2:03AM
-0.03
2:24PM
-0.05
2:32AM
-0.04
2:58PM
-0.03
2:58AM
-0.02
3:28PM
0.01
3:23AM
-0.00
3:57PM
0.05
3:47AM
0.03
Thu
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Sunrise--6:28--6:30--6:31--6:31--6:33--6:33--6:35
Sunset6:50--6:49--6:46--6:45--6:43--6:42--6:39--
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
Rain (mm)
---------------------
Temp. °C232123252317181616161516181721222121201717
Feels °C (?)222023232012141311111215171619202122211415
  • 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 Rhode Island

  1. weather stationWind Update Continuing clean conditions at Lighthouse-Southside (light winds from the N at BUOY-NWPR1 20 km from Lighthouse-Southside). 0.7m 7s swell from the SE with a 0.2m 6s windswell from the SSW. 2 swells combining to make bigger set waves.

    1 hour 2 minutes ago Lighthouse-Southside
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20 km away, 1 h 2 min ago

9 km/h
N
0.0
19.9
Air / Water (°C)
Please reload the page to see if there are any updates.

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 Lighthouse-Southside 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 Lighthouse-Southside at:
surf-forecast.com

Information about the Lighthouse-Southside Surf forecast

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

Lighthouse-Southside is 8 km (5 miles) from Narragansett Pier. If you plan a vacation in Rhode Island, look for hotels and other accommodation in Narragansett Pier. Narragansett Pier has rooms for a wide range of budgets as well as car hire and transport links.

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