Block Island (Old Harbor) Location

Block Island (Old Harbor) Monthly Tide Charts

September, 2026

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

1

Tide Chart for 9/1
Tide Time Height
Low 4:16 AM -0.01 ft
High 11:01 AM 3.52 ft
Low 5:03 PM 0.36 ft
High 11:25 PM 2.9 ft

2

Tide Chart for 9/2
Tide Time Height
Low 4:58 AM 0.08 ft
High 11:51 AM 3.46 ft
Low 6:00 PM 0.5 ft

3

Tide Chart for 9/3
Tide Time Height
High 12:19 AM 2.75 ft
Low 5:47 AM 0.21 ft
High 12:47 PM 3.37 ft
Low 7:27 PM 0.61 ft

4

Tide Chart for 9/4
Tide Time Height
High 1:19 AM 2.64 ft
Low 6:48 AM 0.33 ft
High 1:50 PM 3.28 ft
Low 9:05 PM 0.62 ft

5

Tide Chart for 9/5
Tide Time Height
High 2:25 AM 2.6 ft
Low 8:01 AM 0.4 ft
High 3:01 PM 3.25 ft
Low 10:19 PM 0.52 ft

6

Tide Chart for 9/6
Tide Time Height
High 3:38 AM 2.67 ft
Low 9:32 AM 0.37 ft
High 4:18 PM 3.31 ft
Low 11:18 PM 0.35 ft

7

Tide Chart for 9/7
Tide Time Height
High 4:50 AM 2.86 ft
Low 10:57 AM 0.22 ft
High 5:26 PM 3.45 ft

8

Tide Chart for 9/8
Tide Time Height
Low 12:09 AM 0.16 ft
High 5:51 AM 3.15 ft
Low 12:01 PM 0.04 ft
High 6:21 PM 3.59 ft

9

Tide Chart for 9/9
Tide Time Height
Low 12:55 AM -0.01 ft
High 6:44 AM 3.43 ft
Low 12:55 PM -0.1 ft
High 7:10 PM 3.67 ft

10

Tide Chart for 9/10
Tide Time Height
Low 1:36 AM -0.14 ft
High 7:33 AM 3.66 ft
Low 1:45 PM -0.18 ft
High 7:55 PM 3.66 ft

11

Tide Chart for 9/11
Tide Time Height
Low 2:13 AM -0.21 ft
High 8:19 AM 3.8 ft
Low 2:31 PM -0.17 ft
High 8:38 PM 3.56 ft

12

Tide Chart for 9/12
Tide Time Height
Low 2:46 AM -0.2 ft
High 9:02 AM 3.83 ft
Low 3:12 PM -0.09 ft
High 9:19 PM 3.39 ft

13

Tide Chart for 9/13
Tide Time Height
Low 3:14 AM -0.1 ft
High 9:44 AM 3.74 ft
Low 3:50 PM 0.06 ft
High 9:59 PM 3.17 ft

14

Tide Chart for 9/14
Tide Time Height
Low 3:40 AM 0.05 ft
High 10:24 AM 3.55 ft
Low 4:26 PM 0.26 ft
High 10:39 PM 2.91 ft

15

Tide Chart for 9/15
Tide Time Height
Low 4:07 AM 0.24 ft
High 11:05 AM 3.3 ft
Low 5:02 PM 0.48 ft
High 11:21 PM 2.66 ft

16

Tide Chart for 9/16
Tide Time Height
Low 4:40 AM 0.45 ft
High 11:48 AM 3.04 ft
Low 5:45 PM 0.7 ft

17

Tide Chart for 9/17
Tide Time Height
High 12:06 AM 2.43 ft
Low 5:19 AM 0.66 ft
High 12:35 PM 2.8 ft
Low 6:55 PM 0.89 ft

18

Tide Chart for 9/18
Tide Time Height
High 12:56 AM 2.26 ft
Low 6:07 AM 0.84 ft
High 1:30 PM 2.62 ft
Low 8:31 PM 0.99 ft

19

Tide Chart for 9/19
Tide Time Height
High 1:53 AM 2.14 ft
Low 7:10 AM 0.97 ft
High 2:36 PM 2.53 ft
Low 9:44 PM 0.98 ft

20

Tide Chart for 9/20
Tide Time Height
High 3:01 AM 2.11 ft
Low 8:37 AM 0.99 ft
High 3:57 PM 2.56 ft
Low 10:41 PM 0.88 ft

21

Tide Chart for 9/21
Tide Time Height
High 4:19 AM 2.2 ft
Low 10:20 AM 0.88 ft
High 5:00 PM 2.68 ft
Low 11:26 PM 0.73 ft

22

Tide Chart for 9/22
Tide Time Height
High 5:15 AM 2.4 ft
Low 11:17 AM 0.7 ft
High 5:44 PM 2.85 ft

23

Tide Chart for 9/23
Tide Time Height
Low 12:04 AM 0.55 ft
High 5:57 AM 2.67 ft
Low 12:03 PM 0.49 ft
High 6:20 PM 3.02 ft

24

Tide Chart for 9/24
Tide Time Height
Low 12:36 AM 0.35 ft
High 6:33 AM 2.97 ft
Low 12:45 PM 0.3 ft
High 6:54 PM 3.16 ft

25

Tide Chart for 9/25
Tide Time Height
Low 1:04 AM 0.17 ft
High 7:09 AM 3.27 ft
Low 1:25 PM 0.13 ft
High 7:30 PM 3.26 ft

26

Tide Chart for 9/26
Tide Time Height
Low 1:32 AM 0 ft
High 7:46 AM 3.54 ft
Low 2:05 PM 0.01 ft
High 8:08 PM 3.31 ft

27

Tide Chart for 9/27
Tide Time Height
Low 2:01 AM -0.12 ft
High 8:25 AM 3.73 ft
Low 2:44 PM -0.05 ft
High 8:48 PM 3.29 ft

28

Tide Chart for 9/28
Tide Time Height
Low 2:34 AM -0.18 ft
High 9:07 AM 3.84 ft
Low 3:24 PM -0.03 ft
High 9:31 PM 3.21 ft

29

Tide Chart for 9/29
Tide Time Height
Low 3:10 AM -0.17 ft
High 9:51 AM 3.84 ft
Low 4:06 PM 0.06 ft
High 10:18 PM 3.08 ft

30

Tide Chart for 9/30
Tide Time Height
Low 3:51 AM -0.1 ft
High 10:39 AM 3.74 ft
Low 4:54 PM 0.23 ft
High 11:09 PM 2.93 ft

Tide prediction source: NOAA
Vertical datum: MLLW — Mean Lower Low Water