St Catharines surfForecast / Lake Ontario / Canada

information circle16 Day Weather and Surf, issued 1 am Saturday 21 Mar 2026 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
1.9° C
(Which is normal for this time of year)
Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 4mm), mostly falling on Sun afternoon. Icy conditions (max 5°C on Sun morning, min -2°C on Mon night). Winds increasing (calm on Sun morning, fresh winds from the NNW by Mon night).

Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Wed night. Icy conditions (max 11°C on Thu afternoon, min -3°C on Thu night). Winds increasing (calm on Tue morning, strong winds from the SW by Thu morning).

Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
Period(s) (?)---------------------
Wave
Graph
(?)Metric surfscale
Energy kJ (?)000000000000000000000
Wind
(km/h)
10
NNE
15
ENE
10
ENE
10
WSW
25
NE
25
NE
15
N
10
NNW
20
N
5
SSE
20
WSW
15
W
20
ENE
35
ENE
10
E
40
SW
30
NW
35
NNW
15
NNW
5
N
5
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
ononcross-
on
cross-
off
ononcross-
on
crosscross-
on
cross-
off
cross-
off
cross-
off
cross-
on
oncross-
on
offcrosscross-
on
cross-
on
glassglass
High Tide
/ height (m)
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
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
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Sunrise7:18--7:16--7:15--7:13--7:11--7:09--7:07--
Sunset-7:29--7:30--7:30--7:32--7:34--7:35--7:36-
part cloud
cloud
cloud
cloud
light rain
cloud
part cloud
part cloud
part cloud
clear
cloud
cloud
cloud
cloud
light rain
light rain
cloud
cloud
part cloud
part cloud
part cloud
Rain (mm)
----4---------32-----
Temp. °C334532-121-2540259116-500
Feels °C (?)-1-101-2-4-7-3-7-5-2-3-5-60050-12-4-4
  • 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
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Quick surf report for St Catharines:

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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.


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 16 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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