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Surf Forecasts

St Catharines surfForecast / Lake Ontario / Canada

information circle12 Day Weather and Surf, issued 1 am Friday 09 May 2025 EDT
Forecast update in hr  min  s Forecast update imminent
St Catharines surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's St Catharines sea temperature is
7.4° C
 (Which is slightly warmer than usual)
Hourly12 Days
Lake Ontario – Canada Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)————————————————————————————————————
Period(s) (?)------------------------------------
Wave
Graph
(?)Metric surfscale
Energy (?)000000000000000000000000000000000000
Wind
(km/h)
15
NE
5
ENE
15
W
15
WSW
15
W
15
NNW
15
NE
15
NE
5
ESE
15
NE
10
NNE
5
NW
0
SW
10
E
5
SE
5
W
5
N
5
N
5
N
5
ENE
10
E
5
NNE
5
N
15
W
10
WNW
20
WNW
10
N
20
ENE
15
ENE
10
ENE
25
ENE
30
ENE
15
ENE
20
NE
15
ESE
5
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onglasscross-
off		cross-
off		cross-
off		cross-
on		ononglassononglassglasscross-
on		crossglassglassglassglassoncross-
on		cross-
on		glasscross-
off		cross-
off		cross-
off		cross-
on		oncross-
on		cross-
on		ononcross-
on		oncross-
on		cross-
off
High Tide
/ height (m)
n/a
n/a
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n/a
n/a
Low Tide
/ height (m)
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
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Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Sunrise5:58--5:58--5:56--5:56--5:54--5:54--5:52--5:50--5:50--5:48--5:48--5:48--
Sunset-8:25--8:27--8:28--8:30--8:30--8:31--8:32--8:34--8:35--8:36--8:37--8:37-
clearclearpart cloudpart cloudpart cloudpart cloudclearclearclearclearpart cloudpart cloudpart cloudcloudcloudlight rainpart cloudcloudpart cloudpart cloudpart cloudpart cloudpart cloudthunderstorm clearclearclearclearclearpart cloudcloudpart cloudpart cloudpart cloudpart cloudclear
Rain (mm)
---------------2-------3------------
Temp. °C7111212181661112101314171718151415151716151617152016111414111413131818
Feels °C (?)39971413178710141816181614161517151516181215147911588101517

Short Range Forecast: Mostly dry. Very mild (max 18°C on Sat afternoon, min 6°C on Fri morning). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Wed morning. Very mild (max 18°C on Tue night, min 9°C on Mon morning). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 3mm), mostly falling on Fri night. Warm (max 20°C on Sat afternoon, min 9°C on Sat night). Wind will be generally light.

Long Range Forecast: Mostly dry. Very mild (max 18°C on Tue afternoon, min 9°C on Sun night). Winds decreasing (fresh winds from the ENE on Mon afternoon, calm by Tue night).

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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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 St Catharines 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 St Catharines at:
surf-forecast.com

Information about the St Catharines Surf forecast

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

Are you planning a holiday in Lake Ontario - Canada? If you are looking for accommodation near St Catharines, camping, hotels and holiday cottages in Lake Ontario - Canada, consider staying in Saint Catharines which is 13 km (8 miles) away. Other places in and around Lake Ontario - Canada where you can find information about places to rent, and car hire include Thorold which is 18 km (11 miles) away, Niagara Falls, Niagara Falls and Welland.

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