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Every cruise guide has a “hidden gems” list, and every one of them has the causation backwards. Quiet ports are not quiet because nobody has noticed them yet. They are quiet because something specific is keeping the big ships out — a national decree, a negotiated cap, or a channel that is simply too shallow.
That distinction matters when you are booking. A port kept small by law will still be small next year. A port kept small by a voluntary agreement might not be. And a port kept small by its own seabed can change the moment somebody funds a dredger.
Here are the three mechanisms, with named ports and the actual rules.
1. The decree: Venice, where the rule is written in tonnes and metres
The most decisive intervention in modern cruising happened on 13 July 2021, when the Italian government issued a decree taking effect on 1 August 2021, closing the San Marco Basin, the San Marco Canal and the Giudecca Canal to large ships.
What makes it unusually useful to a passenger is that the ban is defined by measurements rather than by ship names. According to contemporaneous reporting of the decree, a vessel is excluded if it meets any one of these:
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Send me the free kit →| Threshold | Limit |
|---|---|
| Gross tonnage | more than 25,000 GT |
| Hull length at the waterline | more than 180 metres (about 590 ft) |
| Air draft (height above the waterline) | more than 35 metres, excluding hybrid sail-and-engine vessels |
| Fuel sulphur content while manoeuvring | 0.1% or higher |
Twenty-five thousand gross tons is a severe limit. It excludes not just the megaships but most of what the industry now calls small: a 600-passenger luxury vessel like Seabourn Encore is about 40,350 GT, and Viking’s ocean ships are around 47,800 GT. The ships that can still work the historic waterways are genuinely small operators — Windstar’s fleet, for instance, sits under the threshold.
2. The handshake: Juneau’s cap, which still is not law
Alaska’s capital took the opposite approach, and the difference is instructive. Rather than legislate, the City and Borough of Juneau negotiated with the industry. The agreement, announced in April 2023 and formalised in a Memorandum of Agreement with the Cruise Lines International Association, sets a threshold of no more than five large ships in port per day, with daily passenger numbers capped at 16,000, falling to 12,000 on Saturdays.
Juneau’s tourism manager, Alexandra Pierce, framed it as planning certainty: “This agreement provides our community with the assurance we need to plan for the future.” CLIA’s Renée Limoge Reeve replied that “destination stewardship remains one of our highest priorities.”
Here is the part almost nobody outside Juneau knows: the cap is voluntary, and as of October 2026 it still is. On 1 September 2026 the Juneau Assembly was due to vote on an ordinance codifying the five-ship limit into local law, which would have made it illegal for a sixth ship to berth. The Assembly delayed the vote 5–4, with the mayor citing the city’s finances and unfinished work by its Visitor Industry Task Force. The vote was put off until that task force finishes, and as of October 20, 2026 we found no report that the Assembly had taken the ordinance up again.
The City Attorney’s warning is the line worth remembering, because it explains why so few ports legislate:
“There is no scenario where you don’t get sued in this.”
Juneau City Attorney, on codifying the five-ship limit — litigation estimated at $1–4 million with uncertain outcome
Deputy Mayor Greg Smith put the case for leaving it alone more plainly: “We have a five-ship limit now… I guess I’m kind of like, ‘Don’t kick the dog if it’s not misbehaving.'” Assembly member Ella Adkison, arguing for codification, called it “something that everyone has kind of rallied around as a good thing and a good first step”.
3. The seabed: the limit nobody votes on
The third mechanism needs no politics at all. A port with a shallow approach channel, a short berth or a low bridge simply cannot take a large ship, and no amount of demand changes that until somebody pays for engineering.
This is the least stable of the three protections, because dredgers exist — and because dredging does not always work. We covered a case in point in Cairns, where A$127 million was spent deepening the channel for bigger ships and the mud came back. Ports in this category can flip from quiet to busy within a single funding cycle, or stay quiet despite the money.
Which protection is which
| Mechanism | Example | How durable |
|---|---|---|
| National decree | Venice — ships over 25,000 GT excluded from the historic waterways since 1 August 2021 | Very. Changing it needs a government to act. |
| Negotiated cap | Juneau — five large ships and 16,000 passengers a day, by agreement with CLIA | Uncertain. Still voluntary; a vote to make it law was delayed on 1 September 2026. |
| Physical limit | Shallow channels, short berths, low bridges | Holds until funded — and sometimes not even then. |
What this means when you book
- Match the ship to the port, not the brochure. If a historic waterway is the reason you are going, check the tonnage of the ship you have booked against the port’s limit. In Venice’s case a 40,000-GT “small” ship is still too big.
- A voluntary cap is a forecast, not a guarantee. Juneau’s five-ship limit has held, but it is an agreement between a city and a trade association, not a law, and the people who negotiated it say so.
- Quiet ports get busier when the constraint is money. A dredging programme or a new berth can change a destination faster than its reputation updates.
- Check the day, not just the port. Where caps exist they are usually daily, and often lower at weekends — Juneau’s Saturday limit is a quarter below its weekday one. The same port can be calm or crowded depending on when your ship calls.
- Tender-only calls are a signal. If the itinerary says the ship anchors offshore and tenders you in, that port has a physical constraint and is likely to stay smaller than its neighbours.
Quick Answers
Are cruise ships banned from Venice?
Large ones are banned from the historic waterways. Since 1 August 2021, vessels over 25,000 gross tons, longer than 180 metres at the waterline, taller than 35 metres above the waterline, or burning fuel with 0.1% or more sulphur while manoeuvring cannot enter the San Marco Basin, San Marco Canal or Giudecca Canal. Smaller ships still can.
How many cruise ships can dock in Juneau in a day?
Five large ships, under an agreement between the City and Borough of Juneau and the Cruise Lines International Association, with passenger numbers capped at 16,000 a day and 12,000 on Saturdays. The limit is voluntary rather than law.
Is Juneau’s five-ship limit legally binding?
No. An ordinance to codify it was put to the Juneau Assembly on 1 September 2026 and the vote was delayed 5–4. The City Attorney warned that codifying the limit would invite litigation costing an estimated $1–4 million.
Why do some cruise ports stay small?
Three reasons: a government rule excluding large ships, a negotiated cap between the port community and the cruise lines, or a physical constraint such as a shallow channel, a short berth or a low bridge. Only the first is genuinely hard to reverse.
Sources: the City and Borough of Juneau’s announcement of the port capacity agreement; KTOO’s report of the Assembly’s 1 September 2026 vote; and reporting of the Italian decree of 13 July 2021. Correction and rewrite: an earlier version of this article described “hidden gems” in general terms without naming a single port or rule. It has been rewritten around named ports and published limits. Cruise Chaos earns nothing from cruise lines, ports or tourism boards, and links no booking affiliates. If we have something wrong, tell us and we will correct it.
