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Port Douglas · 11 reef tours compared
Great Barrier Reef Snorkel Tour Port Douglas
Port Douglas has 11 reef trips on GetYourGuide — out to Agincourt Reef on the outer reef, about 90 minutes away, or to Low Isles, a coral cay 15–30 minutes from the marina.
OUR PORT DOUGLAS PICK · MOST TIME ON THE REEF★4.80(437)
Silversonic (Agincourt)
Port Douglas · 8 h · 3 Agincourt sites · guided snorkelPort Douglas · 8 h · ★4.80(437)
5h
5 h at the reefof an 8 h day
From · per personA$328≈US$226 · per personCheck dates
11reef tours leave Port Douglas
≈90minutes by boat to Agincourt Reef
15–30minutes to Low Isles
4.94top rating, 889 reviews
The short answer
From Port Douglas most people go to Agincourt Reef: A$319–329 for a full day, and Silversonic and Poseidon list 5 hours at three sites. Low Isles is closer and calmer — from A$190 for a short trip, A$365 for a full day on a luxury catamaran.
From · per personA$328≈US$226 · per personCheck dates
Agincourt platform + helicopter
7 h· Crystalbrook Marina★4.66(24)
5h
5 h at the reef+ 10-min helicopter flight
From · per personA$540≈US$373 · per personCheck dates
Low Isles glass-bottom & snorkel
4 h· Crystalbrook Marina★4.65(555)
not stated
Reef time not statedglass-bottom boat · 30-min ride
From · per personA$246≈US$170 · per personCheck dates
Low Isles catamaran day
8 h· Crystalbrook Marina★4.85(109)
4.5h
4.5 h on Low Islesluxury catamaran
From · per personA$365≈US$252 · per personCheck dates
Low Isles afternoon cruise
5.5 h· Crystalbrook Marina★4.76(108)
not stated
Reef time not statedafternoon sail
From · per personA$365≈US$252 · per personCheck dates
Low Isles reef snorkel
2.25 h· Crystalbrook Marina★4.56(71)
1.5h
1.5 h at Low Isles15-min speedboat
From · per personA$190≈US$131 · per personCheck dates
Low Isles half-day speedboat
3.5 h· Crystalbrook Marina★4.85(37)
2h
2 h at Low Isleshalf-day · lagoon
From · per personA$250≈US$172 · per personCheck dates
Source: GetYourGuide tour pages · checked Oct 2026 · time on the reef as each tour page states it
Shortlist · 11 tours
Find Your Port Douglas Great Barrier Reef Snorkel Tour in Two Taps
Tell us what matters most — we show the top 5, not all 11.
1What matters most?
2Kind of day
3 options · swipe
1Most time on the reefSilversonic (Agincourt)Agincourt reef · 8 h · Crystalbrook Marina5h5 h at the reef★4.80(437)A$328Check dates
2Most time on the reefPoseidon (Agincourt)Agincourt reef · 8 h · Crystalbrook Marina5h5 h at the reef★4.85(34)A$328Check dates
3Most time on the reefAgincourt platform + helicopterAgincourt reef · 7 h · Crystalbrook Marina5h5 h at the reef★4.66(24)A$540Check dates
4Most time on the reefLow Isles catamaran dayLow Isles · 8 h · Crystalbrook Marina4.5h4.5 h on Low Isles★4.85(109)A$365Check dates
5Most time on the reefLow Isles reef snorkelLow Isles · 2.25 h · Crystalbrook Marina1.5h1.5 h at Low Isles★4.56(71)A$190Check dates
6Most time on the reefLow Isles half-day speedboatLow Isles · 3.5 h · Crystalbrook Marina2h2 h at Low Isles★4.85(37)A$250Check dates
7Most time on the reefPort Douglas outer reef cruiseAgincourt reef · 8 h · Crystalbrook Marinanot statedReef time not stated★4.94(889)A$329Check dates
8Most time on the reefLow Isles glass-bottom & snorkelLow Isles · 4 h · Crystalbrook Marinanot statedReef time not stated★4.65(555)A$246Check dates
9Most time on the reefAgincourt snorkel & diveAgincourt reef · 7.5 h · Crystalbrook Marinanot statedReef time not stated★4.84(533)A$319Check dates
10Most time on the reefLow Isles afternoon cruiseLow Isles · 5.5 h · Crystalbrook Marinanot statedReef time not stated★4.76(108)A$365Check dates
11Most time on the reef12-passenger guided reef cruiseAgincourt reef · 7.5 h · Crystalbrook Marinanot statedReef time not stated★ 5.00 · only 9 reviewsA$639Check dates
Source: GetYourGuide · prices checked Oct 2026 · A$ = Australian dollars, per person · tours with under 20 reviews appear only in the full list
Low Isles vs Agincourt
Low Isles or Agincourt Reef: Which Great Barrier Reef Snorkel Tour from Port Douglas?
Low Isles5 trips · from A$190
vs
Agincourt Reef5 day trips · from A$319
better15–30 min
Boat ride
About 90 min each way
Up to 4.5 h on the island (catamaran day)
Time in the water
5 h at three sites on Silversonic and Poseidonbetter
What to Know Before a Great Barrier Reef Snorkel Tour from Port Douglas
Stinger seasonNov – May
Trips keep running; full-body lycra suits are usually provided on board.
Reef taxA$8.50
Environmental Management Charge for a full day. Most tickets include it — check “Includes”.
Wet seasonNov – Apr
Heaviest rain Jan–Mar. Rough seas can cancel or shorten a day.
Intro divesAge 12+
Usually from 12. Most snorkel tours take children with flotation.
Where you board: most tours leave from the Crystalbrook Superyacht Marina (44 Wharf St, Port Douglas). A few offer hotel pickup — your ticket names the meeting point.
How long is the boat ride from Port Douglas to the reef?
About 90 minutes each way to Agincourt Reef on the outer reef. Low Isles is much closer — 15 to 30 minutes, depending on the boat.
Which Port Douglas tour gives the most time on the reef?
Silversonic and Poseidon both list 5 hours at three Agincourt sites. The Agincourt platform day with a helicopter flight also lists 5 hours.
Low Isles or Agincourt Reef?
Agincourt is the outer reef — bigger coral and open-water fish, a longer ride and A$319+. Low Isles is a small coral cay close to shore: calmer, cheaper and good with kids.
Can non-swimmers do a reef tour from Port Douglas?
Low Isles with the glass-bottom boat is the easiest choice. Check each tour’s rules — the Port Douglas outer reef cruise asks that guests can swim 50 m without a flotation device.
Where do Port Douglas reef tours leave from?
Most board at the Crystalbrook Superyacht Marina, 44 Wharf St. A few offer hotel pickup.
What is the cheapest reef trip from Port Douglas?
The Low Isles reef snorkel from A$190 (about 2¼ hours). Outer reef days to Agincourt start at A$319.
Port Douglas or Cairns for snorkelling?
Cairns has far more choice (46 tours) and outer reef days from A$230. From Port Douglas, Agincourt days start at A$319 and two of them list 5 hours at three sites.
Can I see the reef from the air from Port Douglas?
Yes — the Agincourt platform day adds a scenic helicopter flight, from A$540.
Port Douglas outer reef cruise · rated 4.94 (889)
OUR PORT DOUGLAS PICK · MOST REEF TIME
Low Isles5 trips · from A$190
Agincourt Reef5 day trips · from A$319
