Portland Tide Chart (ME)

Portland (ME) tide times, Jul 29 – Aug 6

Day	Time	Tide	Height
Wed Jul 29	5:55 AM	Low	0.4 ft (0.11 m)
	12:07 PM	High	8.5 ft (2.58 m)
	5:51 PM	Low	1.3 ft (0.40 m)
Thu Jul 30	12:06 AM	High	9.8 ft (3.00 m)
	6:29 AM	Low	0.2 ft (0.06 m)
	12:43 PM	High	8.7 ft (2.65 m)
	6:29 PM	Low	1.1 ft (0.35 m)
Fri Jul 31	12:43 AM	High	9.9 ft (3.02 m)
	7:02 AM	Low	0.1 ft (0.03 m)
	1:17 PM	High	8.9 ft (2.71 m)
	7:07 PM	Low	1.0 ft (0.29 m)
Sat Aug 1	1:19 AM	High	9.9 ft (3.01 m)
	7:36 AM	Low	0.0 ft (0.01 m)
	1:51 PM	High	9.1 ft (2.79 m)
	7:45 PM	Low	0.8 ft (0.24 m)
Sun Aug 2	1:56 AM	High	9.8 ft (2.99 m)
	8:10 AM	Low	0.0 ft (0.01 m)
	2:25 PM	High	9.4 ft (2.86 m)
	8:27 PM	Low	0.6 ft (0.19 m)
Mon Aug 3	2:35 AM	High	9.6 ft (2.93 m)
	8:48 AM	Low	0.1 ft (0.03 m)
	3:03 PM	High	9.6 ft (2.93 m)
	9:11 PM	Low	0.5 ft (0.16 m)
Tue Aug 4	3:19 AM	High	9.4 ft (2.86 m)
	9:29 AM	Low	0.3 ft (0.08 m)
	3:45 PM	High	9.8 ft (2.98 m)
	10:01 PM	Low	0.4 ft (0.13 m)
Wed Aug 5	4:09 AM	High	9.1 ft (2.77 m)
	10:16 AM	Low	0.5 ft (0.14 m)
	4:33 PM	High	9.9 ft (3.02 m)
	10:55 PM	Low	0.4 ft (0.12 m)
Thu Aug 6	5:04 AM	High	8.8 ft (2.68 m)
	11:07 AM	Low	0.7 ft (0.21 m)
	5:26 PM	High	10.0 ft (3.05 m)
	11:53 PM	Low	0.4 ft (0.12 m)

Portland is semidiurnal — paired highs (8.5 ft today) and paired lows of similar size. This is a big-tide station: an average swing this week moves 8.9 ft, so the water line, current and structure change dramatically through a single cycle. A 9.9 ft swing — Portland's biggest this table — runs from the 1:19 AM high on Sat Aug 1 into the next low. Portland tops out at 10.0 ft (Thu Aug 6 5:26 PM) and bottoms at 0.0 ft (Sat Aug 1 7:36 AM).

Moving-water windows — Portland

Portland mid-swing times below mark predicted peak flow on its 8.9 ft average cycle (why moving water matters):

• Wed Jul 29: 9:01 AM — 8.1 ft flood · 2:59 PM — 7.2 ft ebb · 8:58 PM — 8.5 ft flood
• Thu Jul 30: 3:17 AM — 9.6 ft ebb · 9:36 AM — 8.5 ft flood · 3:36 PM — 7.5 ft ebb · 9:36 PM — 8.8 ft flood

Portland numbers: NOAA CO-OPS #8418150 (Portland), 1.2 km off Portland center; this open-water pick beat 17 closer-in candidates. On a coast that swings 8.9 ft, storm surge stacked on the 10.0 ft high is a real hazard at Portland — predictions are astronomical only. All Portland times station-local, refreshed 2026-07-29.