Whale watching rules in Mexico: distance, permit and the flag to look for

The authorization and the numbered season flag

Nobody may offer whale watching in Mexico without first obtaining an authorization from SEMARNAT for non-extractive use of wildlife. That paperwork is the base layer, and it is not the part you see. What you can see is the official identifying marker an authorized boat has to carry in a visible place for the whole time it is providing the service.

In practice the marker that matters to a passenger is the flag. Each season brings a new one: SEMARNAT hands a fresh flag to every authorized company, numbered in the bottom right corner for the year it covers, and the boat has to fly it the entire time it is working with whales. Read that number in the corner and match it against the season you are travelling in.

Before the boat leaves the dock the standard puts one more duty on the operator: passengers get told how they are required to behave, and the rules have to be posted on visible signage. If you board, cast off and nobody says a word about distance or behaviour, an obligation written into the standard has already been skipped.

Minimum distance from whales in Mexico, by species and boat size

NOM-131-SEMARNAT-2010 fixes a minimum observation distance between any vessel and a whale or group of whales, and it is deliberately not one single number. The figure moves with the species and with the size of the boat. For humpbacks, the animals most visitors at the cape are looking at, a small boat under 10 metres has to hold at least 60 metres and a medium or large vessel at least 80 metres.

At Los Cabos that works out to roughly 60 to 80 metres between a permitted boat and the whale, depending on the hull you are standing on. Close enough to follow a blow and a raised tail with the naked eye, and far enough that a mid-range zoom is worth carrying.

The gap between a permitted and an unpermitted boat is the whole argument for checking the authorization first. A boat without a whale-watching permit must stay about 800 feet off the animals, which is well outside the view that any cheap unauthorized ride would be advertising to you.

Four boats, 30 minutes and the speed inside the zone

Four is the cap on boats around one whale or one group at any moment, and your boat's clock on that group stops at 30 minutes. Vessels that are not the ones observing hold 240 metres from the animals while they wait for a slot, which is why a well-run trip includes stretches of sitting still some way off.

Speed is capped twice. Inside an observation area the maximum is under 5 knots (9 km/h), and on entering the observation zone a boat comes down to about 2 knots (4 km/h). You feel both: the engine note drops long before you are anywhere near the whale.

Approach geometry is written into the standard as well. A travelling whale may be approached only on a diagonal line, from the rear quarter, parallel to the course it is already swimming. A boat pointing at a whale head-on is not doing it correctly.

While observing, the engine must be kept running in neutral when the whale is not moving. There is one permitted exception: the engine may be switched off to use a hydrophone and listen to whale song. That clause is why hydrophone boats are worth booking: with the engine off, you actually hear the whales. Ask whether the operator carries one before you pay.

What is forbidden around a whale

The list of prohibitions is short and it closes off most of what visitors ask about. Fishing, diving, swimming, water-skiing and parasailing are all prohibited during whale observation, so no lawful trip at Cabo puts a passenger in the water with a whale. Locating whales with sonar or echo-sounding equipment is prohibited too; the crew works by eye, from the surface.

Two rules exist specifically for the animals that draw people to the wintering grounds. Putting the hull between a mother and her calf is prohibited, as is any approach to whales that are mating or giving birth. Harassing, harming or feeding whales is prohibited in all cases. Those limits cover at least nine whale species living in Mexican waters, every one of them classified by SEMARNAT as a species at risk.

• No swimming, diving, fishing, water-skiing or parasailing during observation
• No jet skis, kayaks, canoes or paddle-powered inflatables used for whale watching
• No observation from submersibles, ultralights or helicopters in the authorised zones
• Sonar and echo-sounding equipment ruled out as a way of locating whales
• No positioning the boat between a mother and her calf
• No approach to whales that are mating or calving

Whale watching rules in Mexico: the distance and permit checks before you pay

Two questions before money changes hands: does the operator hold the SEMARNAT authorization, and does the boat fly this season's flag with the year number in the bottom right corner. On the water, judge the trip by things you can count rather than by what the crew says about getting close: how many boats sit with one whale, how long your boat stays with that group, how far back you hold while queueing, and how slowly you enter the zone.

Take the Humpback Whale Watching Tour in Cabo San Lucas if you want those checks met without anything extra layered on top. A marine biologist is aboard to explain the distance calls, bottled water and marine park fees are covered, and the trip runs 2.5 hours, from $99, rated 4.9 ★ (1065 reviews). Hotel pickup sits outside the price and souvenir photos are a separate purchase, so arrange your own ride to the meeting office inside the Tesoro Hotel at Local A-20, beside the marina.

The clause about switching the engine off is the reason to look at the Small-Group Whale Watch with Marine Biologist in Cabo San Lucas. It carries the hydrophone that makes the silence legal, there is a restroom on board, and the guide's photos go to guests at no extra charge; 2.5 hours, from $109, rated 4.9 ★ (1256 reviews). Check in at Plaza Bonita, inside the Cabo San Lucas Marina. Transportation and gratuities are not included.

If two hours is enough time on the water, Cabo Whale Watching: Female Crew, Guaranteed Sightings, Photos runs that length, from 1,680 pesos, rated 5.0 ★ (2144 reviews). The captains and guides are biologists, digital photos of the trip are included, and the whale warranty gives you a second departure at no cost if the first one finds nothing. Give a driver or a map app the Breathless hotel as the reference point: the boat is at dock zero in front of it and the guides stand outside the dock in green shirts. The dock fee and the optional shuttle are not included.

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