Niagara Falls rainbow in May 2027

Short answer: On 15 May 2027: Best rainbow from Canadian side, facing the American Falls, 15:00–20:15 (strongest around 17:45), if the sun is out. Every day of May is in the table. Water level in May: high.

The mist plume over the Horseshoe Falls and the spray at the foot of the American Falls throw rainbows that move from the American side in the morning to the Canadian side in the afternoon.

Date	Canada → American Falls	Table Rock	US side
Sat 1 May	14:45–20:00	16:30–20:00	06:35–10:45
Sun 2 May	14:45–20:00	16:30–20:00	06:35–10:45
Mon 3 May	14:45–20:00	16:30–20:00	06:35–10:45
Tue 4 May	14:45–20:05	16:30–20:05	06:35–10:45
Wed 5 May	14:50–20:05	16:30–20:05	06:30–10:45
Thu 6 May	14:50–20:05	16:25–20:05	06:30–10:45
Fri 7 May	14:50–20:05	16:25–20:05	06:30–10:45
Sat 8 May	14:50–20:05	16:25–20:05	06:30–10:45
Sun 9 May	14:55–20:10	16:25–20:10	06:25–10:45
Mon 10 May	14:55–20:10	16:25–20:10	06:25–10:45
Tue 11 May	14:55–20:10	16:25–20:10	06:25–10:45
Wed 12 May	14:55–20:10	16:25–20:10	06:25–10:45
Thu 13 May	15:00–20:10	16:25–20:10	06:25–10:45
Fri 14 May	15:00–20:15	16:25–20:15	06:20–10:45
Sat 15 May	15:00–20:15	16:20–20:15	06:20–10:45
Sun 16 May	15:00–20:15	16:20–20:15	06:20–10:45
Mon 17 May	15:05–20:15	16:20–20:15	06:20–10:45
Tue 18 May	15:05–20:15	16:20–20:15	06:20–10:45
Wed 19 May	15:05–20:20	16:20–20:20	06:15–10:45
Thu 20 May	15:05–20:20	16:20–20:20	06:15–10:45
Fri 21 May	15:10–20:20	16:20–20:20	06:15–10:45
Sat 22 May	15:10–20:20	16:20–20:20	06:15–10:45
Sun 23 May	15:10–20:20	16:20–20:20	06:15–10:45
Mon 24 May	15:10–20:25	16:20–20:25	06:15–10:45
Tue 25 May	15:10–20:25	16:20–20:25	06:15–10:45
Wed 26 May	15:15–20:25	16:20–20:25	06:10–10:45
Thu 27 May	15:15–20:25	16:20–20:25	06:10–10:45
Fri 28 May	15:15–20:25	16:20–20:25	06:10–10:45
Sat 29 May	15:15–20:25	16:20–20:25	06:10–10:45
Sun 30 May	15:15–20:30	16:20–20:30	06:10–10:45
Mon 31 May	15:20–20:30	16:15–20:30	06:10–10:45

Date

Canada → American Falls

Table Rock

US side

Sat 1 May

14:45–20:00

16:30–20:00

06:35–10:45

Sun 2 May

14:45–20:00

16:30–20:00

06:35–10:45

Mon 3 May

14:45–20:00

16:30–20:00

06:35–10:45

Tue 4 May

14:45–20:05

16:30–20:05

06:35–10:45

Wed 5 May

14:50–20:05

16:30–20:05

06:30–10:45

Thu 6 May

14:50–20:05

16:25–20:05

06:30–10:45

Fri 7 May

14:50–20:05

16:25–20:05

06:30–10:45

Sat 8 May

14:50–20:05

16:25–20:05

06:30–10:45

Sun 9 May

14:55–20:10

16:25–20:10

06:25–10:45

Mon 10 May

14:55–20:10

16:25–20:10

06:25–10:45

Tue 11 May

14:55–20:10

16:25–20:10

06:25–10:45

Wed 12 May

14:55–20:10

16:25–20:10

06:25–10:45

Thu 13 May

15:00–20:10

16:25–20:10

06:25–10:45

Fri 14 May

15:00–20:15

16:25–20:15

06:20–10:45

Sat 15 May

15:00–20:15

16:20–20:15

06:20–10:45

Sun 16 May

15:00–20:15

16:20–20:15

06:20–10:45

Mon 17 May

15:05–20:15

16:20–20:15

06:20–10:45

Tue 18 May

15:05–20:15

16:20–20:15

06:20–10:45

Wed 19 May

15:05–20:20

16:20–20:20

06:15–10:45

Thu 20 May

15:05–20:20

16:20–20:20

06:15–10:45

Fri 21 May

15:10–20:20

16:20–20:20

06:15–10:45

Sat 22 May

15:10–20:20

16:20–20:20

06:15–10:45

Sun 23 May

15:10–20:20

16:20–20:20

06:15–10:45

Mon 24 May

15:10–20:25

16:20–20:25

06:15–10:45

Tue 25 May

15:10–20:25

16:20–20:25

06:15–10:45

Wed 26 May

15:15–20:25

16:20–20:25

06:10–10:45

Thu 27 May

15:15–20:25

16:20–20:25

06:10–10:45

Fri 28 May

15:15–20:25

16:20–20:25

06:10–10:45

Sat 29 May

15:15–20:25

16:20–20:25

06:10–10:45

Sun 30 May

15:15–20:30

16:20–20:30

06:10–10:45

Mon 31 May

15:20–20:30

16:15–20:30

06:10–10:45

Hour by hour for your date Niagara Falls tours

Questions

What time is the rainbow at Niagara Falls in May 2027?

On 15 May 2027: Best rainbow from Canadian side, facing the American Falls, 15:00–20:15 (strongest around 17:45), if the sun is out. Every day of May is in the table. Water level in May: high.