Puerto Rico tide station

Mona Island tide times

Today, Sunday, October 18, 2026: high tide at 4:49 PM (0.8 ft); low tide at 5:03 AM (0.1 ft). Water temperature 85.3 F at buoy 41115 (48 mi away).

NOAA station 9759938 · Reference station · MLLW datum · times in AST · sunrise 6:26 AM, sunset 6:07 PM · first quarter (51% lit)

Low tide▼

5:03AM

0.1FT MLLW

low

High tide▲

4:49PM

0.8FT MLLW

high

predicted height above MLLWnightnow (build time; your browser updates it)

As of 5:20 AM the tide is rising toward high tide at 4:49 PM (0.8 ft).

First Quarter 51% litSunrise 6:26 AMSunset 6:07 PMDaylight 11h 41mAST

High tide at Mona Island, Puerto Rico on October 18, 2026 is at 4:49 PM (0.8 ft above MLLW).
Low tide at Mona Island on October 18, 2026 is at 5:03 AM (0.1 ft).
Today's tidal range at Mona Island is 0.8 ft (highest high 0.8 ft, lowest low 0.1 ft).
The nearest NOAA water temperature to Mona Island is 85.3 F at buoy 41115 (48 mi away), as of October 18, 2026.
Sunrise 6:26 AM, sunset 6:07 PM (AST); moon first quarter, 51% illuminated.
Predictions are NOAA CO-OPS tide predictions for station 9759938 (harmonic reference station), heights above MLLW.

Next 7 days at Mona Island

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Sun Oct 18today	5:03 AM0.1 ft	4:49 PM0.8 ft			6:26 AM	6:07 PM	51%
Mon Oct 19	5:52 AM0.2 ft	5:01 PM0.9 ft			6:26 AM	6:07 PM	61%
Tue Oct 20	6:42 AM0.3 ft	5:11 PM0.9 ft			6:27 AM	6:06 PM	71%
Wed Oct 21	1:43 AM0.5 ft	4:05 AM0.5 ft	7:36 AM0.4 ft	5:23 PM0.8 ft	6:27 AM	6:06 PM	80%
Thu Oct 22	1:18 AM0.5 ft	5:38 AM0.6 ft	12:24 PM0.6 ft	5:35 PM0.8 ft	6:27 AM	6:05 PM	88%
Fri Oct 23	1:10 AM0.5 ft	6:47 AM0.7 ft	2:01 PM0.6 ft	5:50 PM0.7 ft	6:28 AM	6:04 PM	94%
Sat Oct 24	12:35 AM0.4 ft	7:43 AM0.9 ft	3:36 PM0.6 ft	6:06 PM0.6 ft	6:28 AM	6:04 PM	98%

Water temperature near Mona Island

85.3 F (29.6 C)

NDBC buoy 41115 (Rincon, Puerto Rico), 48 mi away, observed 08:56 UTC October 18, 2026

Water temperature is the nearest NOAA reading to Mona Island, not a measurement at the tide gauge itself (this station has no water-temperature sensor). See water temperature by state for every sensor and buoy.

Tide tables

High (▲) and low (▼) tides in AST with sunrise, sunset and moon illumination. CSV of today's tides for every Puerto Rico station.

October 2026 tide table

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Thu Oct 1					6:22 AM	6:20 PM	72%
Fri Oct 2					6:22 AM	6:20 PM	62%
Sat Oct 3					6:23 AM	6:19 PM	52%
Sun Oct 4					6:23 AM	6:18 PM	41%
Mon Oct 5					6:23 AM	6:17 PM	31%
Tue Oct 6					6:23 AM	6:16 PM	22%
Wed Oct 7					6:23 AM	6:16 PM	14%
Thu Oct 8					6:24 AM	6:15 PM	7%
Fri Oct 9					6:24 AM	6:14 PM	3%
Sat Oct 10					6:24 AM	6:13 PM	0%
Sun Oct 11					6:24 AM	6:13 PM	0%
Mon Oct 12					6:25 AM	6:12 PM	2%
Tue Oct 13					6:25 AM	6:11 PM	7%
Wed Oct 14					6:25 AM	6:10 PM	13%
Thu Oct 15					6:25 AM	6:10 PM	21%
Fri Oct 16	3:29 AM-0.0 ft	2:28 PM0.8 ft			6:26 AM	6:09 PM	30%
Sat Oct 17	4:15 AM0.0 ft	4:24 PM0.8 ft			6:26 AM	6:08 PM	40%
Sun Oct 18today	5:03 AM0.1 ft	4:49 PM0.8 ft			6:26 AM	6:07 PM	51%
Mon Oct 19	5:52 AM0.2 ft	5:01 PM0.9 ft			6:26 AM	6:07 PM	61%
Tue Oct 20	6:42 AM0.3 ft	5:11 PM0.9 ft			6:27 AM	6:06 PM	71%
Wed Oct 21	1:43 AM0.5 ft	4:05 AM0.5 ft	7:36 AM0.4 ft	5:23 PM0.8 ft	6:27 AM	6:06 PM	80%
Thu Oct 22	1:18 AM0.5 ft	5:38 AM0.6 ft	12:24 PM0.6 ft	5:35 PM0.8 ft	6:27 AM	6:05 PM	88%
Fri Oct 23	1:10 AM0.5 ft	6:47 AM0.7 ft	2:01 PM0.6 ft	5:50 PM0.7 ft	6:28 AM	6:04 PM	94%
Sat Oct 24	12:35 AM0.4 ft	7:43 AM0.9 ft	3:36 PM0.6 ft	6:06 PM0.6 ft	6:28 AM	6:04 PM	98%
Sun Oct 25	8:32 AM1.0 ft				6:28 AM	6:03 PM	100%
Mon Oct 26	12:10 AM0.1 ft	9:20 AM1.0 ft			6:29 AM	6:03 PM	99%
Tue Oct 27	12:42 AM-0.1 ft	10:08 AM1.0 ft			6:29 AM	6:02 PM	97%
Wed Oct 28	1:20 AM-0.2 ft	11:00 AM1.0 ft			6:30 AM	6:01 PM	92%
Thu Oct 29	2:01 AM-0.2 ft	11:59 AM1.0 ft			6:30 AM	6:01 PM	85%
Fri Oct 30	2:45 AM-0.2 ft	4:05 PM1.0 ft			6:30 AM	6:00 PM	77%
Sat Oct 31	3:32 AM-0.1 ft	4:59 PM1.0 ft			6:31 AM	6:00 PM	68%

November 2026 tide table

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Sun Nov 1	4:21 AM-0.0 ft	5:42 PM0.9 ft			6:31 AM	5:59 PM	57%
Mon Nov 2	5:11 AM0.1 ft	3:43 PM0.9 ft			6:32 AM	5:59 PM	47%
Tue Nov 3	6:03 AM0.3 ft	4:05 PM0.8 ft			6:32 AM	5:59 PM	36%
Wed Nov 4	12:42 AM0.4 ft	4:19 AM0.6 ft	6:57 AM0.5 ft	10:01 AM0.6 ft	6:32 AM	5:58 PM	27%
Thu Nov 5	12:51 AM0.4 ft	5:43 AM0.7 ft	8:01 AM0.7 ft	10:06 AM0.7 ft	6:33 AM	5:58 PM	18%
Fri Nov 6	12:50 AM0.4 ft	6:51 AM0.8 ft	10:39 PM0.2 ft		6:33 AM	5:57 PM	10%
Sat Nov 7	7:46 AM0.9 ft	11:09 PM0.1 ft			6:34 AM	5:57 PM	5%
Sun Nov 8	8:33 AM1.0 ft	11:45 PM-0.0 ft			6:34 AM	5:57 PM	1%
Mon Nov 9	9:16 AM1.0 ft				6:35 AM	5:56 PM	0%
Tue Nov 10	12:23 AM-0.1 ft	9:59 AM1.0 ft			6:35 AM	5:56 PM	1%
Wed Nov 11	1:02 AM-0.2 ft	10:44 AM0.9 ft			6:36 AM	5:56 PM	4%
Thu Nov 12	1:41 AM-0.2 ft	11:31 AM0.9 ft			6:36 AM	5:55 PM	9%
Fri Nov 13	2:19 AM-0.1 ft	12:24 PM0.8 ft			6:37 AM	5:55 PM	16%
Sat Nov 14	2:57 AM-0.1 ft	1:20 PM0.8 ft			6:37 AM	5:55 PM	25%
Sun Nov 15	3:34 AM0.0 ft	2:10 PM0.9 ft			6:38 AM	5:55 PM	35%
Mon Nov 16	4:09 AM0.1 ft	2:43 PM0.9 ft			6:38 AM	5:55 PM	45%
Tue Nov 17	4:42 AM0.3 ft	3:04 PM0.8 ft			6:39 AM	5:54 PM	56%
Wed Nov 18	12:31 AM0.4 ft	3:10 AM0.4 ft	5:11 AM0.4 ft	3:20 PM0.8 ft	6:40 AM	5:54 PM	66%
Thu Nov 19	3:34 PM0.7 ft	11:49 PM0.3 ft			6:40 AM	5:54 PM	76%
Fri Nov 20	9:35 AM0.7 ft	1:38 PM0.6 ft	3:46 PM0.6 ft	11:12 PM0.2 ft	6:41 AM	5:54 PM	84%
Sat Nov 21	7:39 AM0.8 ft	10:32 PM0.1 ft			6:41 AM	5:54 PM	91%
Sun Nov 22	8:07 AM0.9 ft	10:59 PM-0.1 ft			6:42 AM	5:54 PM	96%
Mon Nov 23	8:46 AM1.0 ft	11:36 PM-0.2 ft			6:42 AM	5:54 PM	99%
Tue Nov 24	9:29 AM1.0 ft				6:43 AM	5:54 PM	100%
Wed Nov 25	12:17 AM-0.3 ft	10:14 AM1.0 ft			6:44 AM	5:54 PM	99%
Thu Nov 26	12:59 AM-0.3 ft	11:01 AM1.0 ft			6:44 AM	5:54 PM	95%
Fri Nov 27	1:41 AM-0.3 ft	11:49 AM1.0 ft			6:45 AM	5:54 PM	89%
Sat Nov 28	2:24 AM-0.2 ft	12:35 PM1.0 ft			6:45 AM	5:54 PM	82%
Sun Nov 29	3:06 AM-0.1 ft	1:14 PM0.9 ft			6:46 AM	5:54 PM	73%
Mon Nov 30	3:47 AM0.1 ft	1:45 PM0.9 ft			6:47 AM	5:54 PM	63%

Tidal datums at Mona Island

Heights on this page are above mean lower low water (MLLW), the chart datum. NOAA's accepted datums for station 9759938, in feet above MLLW:

MHHW

29.41 ft

Mean higher high water

MHW

29.36 ft

Mean high water

MSL

29.01 ft

Mean sea level

MLW

28.67 ft

Mean low water

0.69 ft

Mean range

0.81 ft

Diurnal range

Highest observed water level: 31.49 ft above MLLW on September 21, 2017. Tidal datum epoch 1983-2001.

Nearby tide stations

Southeast Mona Island5.0 mi · next high 5:06 PM
Puerto Real49 mi · next high 4:14 PM
Joyuda50 mi · next high 2:14 PM
Bahia Salinas50 mi · next high 6:48 AM
Punta Guanajibo, Mayagues50 mi · next high 2:13 PM
Boqueron50 mi · next high 2:40 PM

Questions

What time is high tide at Mona Island today?

High tide at Mona Island, Puerto Rico on Sunday, October 18, 2026 is at 4:49 PM (0.8 ft above MLLW), NOAA prediction, local time.

What time is low tide at Mona Island today?

Low tide at Mona Island on Sunday, October 18, 2026 is at 5:03 AM (0.1 ft).

What is the water temperature at Mona Island?

The nearest NOAA water-temperature reading to Mona Island is 85.3 F at buoy 41115 (48 mi away), as of October 18, 2026.

Not for navigation. Predictions do not include weather; wind and pressure can move the real water level by a foot or more. Source: NOAA CO-OPS station 9759938.