17.05
sun
sun
Day
73°F
NE 7 mph
Precip.
0%
0%
Night
64°F
N 5 mph
Precip.
0%
0%
18.05
mon
mon
Day
73°F
NE 14 mph
Precip.
0%
0%
Night
66°F
NE 11 mph
Precip.
0%
0%
19.05
tue
tue
Day
72°F
NE 16 mph
Precip.
0%
0%
Night
63°F
NE 12 mph
Precip.
100%
100%
20.05
wed
wed
Day
55°F
SE 9 mph
Precip.
0%
0%
Night
46°F
S 7 mph
Precip.
0%
0%
21.05
thu
thu
Day
54°F
SW 12 mph
Precip.
0%
0%
Night
46°F
W 9 mph
Precip.
0%
0%
22.05
fri
fri
Day
55°F
N 8 mph
Precip.
100%
100%
Night
55°F
NE 9 mph
Precip.
0%
0%
23.05
sat
sat
Day
55°F
E 5 mph
Precip.
0%
0%
Night
54°F
NE 2 mph
Precip.
0%
0%
24.05
sun
sun
Day
64°F
NW 4 mph
Precip.
0%
0%
Night
57°F
NW 5 mph
Precip.
0%
0%
25.05
mon
mon
Day
70°F
N 2 mph
Precip.
0%
0%
Night
64°F
NE 9 mph
Precip.
100%
100%
26.05
tue
tue
Day
68°F
E 14 mph
Precip.
0%
0%
Night
57°F
SE 6 mph
Precip.
0%
0%
27.05
wed
wed
Day
64°F
SW 8 mph
Precip.
0%
0%
Night
57°F
W 6 mph
Precip.
0%
0%
28.05
thu
thu
Day
68°F
SW 6 mph
Precip.
0%
0%
Night
63°F
W 4 mph
Precip.
0%
0%
29.05
fri
fri
Day
75°F
NE 8 mph
Precip.
0%
0%
Night
66°F
NE 15 mph
Precip.
100%
100%
30.05
sat
sat
Day
57°F
E 19 mph
Precip.
100%
100%
Night
55°F
E 12 mph
Precip.
0%
0%
sea water
temperature
temperature
| Niagara Falls |
monthly
weather
weather
| Niagara Falls |
current
weather
weather
| Niagara Falls |
7 days
forecast
forecast
| Niagara Falls |
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 46.1°F. The highest and lowest sea temperatures during the month were 48.9°F and 43.2°F.
Air temperature in Niagara Falls, °F
Precipitation total in Niagara Falls, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Niagara Falls
Niagara Falls on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Niagara Falls
Local time: 15:55
May 17, sunday
1800
81°F
NE
5 mph
5 mph
2100
70°F
N
5 mph
5 mph
May 18, monday
0000
64°F
N
5 mph
5 mph
0300
61°F
N
6 mph
6 mph
0600
61°F
NE
9 mph
9 mph
0900
66°F
NE
11 mph
11 mph
1200
73°F
NE
14 mph
14 mph
1500
77°F
NE
14 mph
14 mph
