Which season for the whale shark in Djibouti?

What is the official whale shark observation window?

It is set by a legal text, and it is a particularity few destinations can claim. Decree No. 2023-362/PR/MCT of 6 December 2023, published by the National Tourism Agency, organises the observation activity while protecting the species. It sets the regulatory season from 15 October to 15 March, and applies first of all to the Arta Plage marine protected area.

Calendar	Period	What it describes	Origin
Regulatory window	15 October – 15 March	The period during which an operator is authorised in the area	Decree No. 2023-362/PR/MCT
Observation peak	November – January	The period when the probability of an encounter is highest	Field records and operator calendars
Possible window	Late October – late February	The period when the animal is actually reported, depending on the year	Publications of the agency and gulf operators

Outside the regulatory window, no operator is authorised in the area. It is not a recommendation, it is a ban on operating.

Why does the regulatory window not coincide with the peak?

Because the two calendars answer two different questions, and many pages publish them side by side without saying so.

The decree defines a legal envelope. It says from when and until when the activity may be operated. It is written to regulate operators and protect a species, not to tell the traveller the best week of the year.

The observation peak is an ecological probability. The whale shark follows plankton; it is pelagic and does not reside in the gulf. Its presence peaks from November to January, with a real window that usually opens in late October and can extend into February depending on the year, the water temperature and the availability of plankton.

In other words, the official window is wider than the peak. Between 15 October and 15 March, you are allowed to go looking for the animal; that does not give you the same probability of finding it. Our reference page, diving and whale sharks, details why official sources announce differently worded seasons: they describe the same phenomenon at different resolutions.

Which month should you choose, according to what you are after?

Period	Regulatory window	Probability of presence	What the period brings
15 – 31 October	Open	Low, rising at the end of the month	Available slots, start of the season
November	Open	High	Entering the peak of presence
December	Open	High	The most comfortable conditions of the season
January	Open	High	The statistical heart of the peak
February	Open	Variable depending on the year	End of the window, more scattered encounters
1 – 15 March	Open	Not documented for that fortnight	The last legal slots
16 March – 14 October	Closed	Very low	No operator authorised in the area

One cell of that table is deliberately left empty. The period from 1 to 15 March is legal, but the record we work from documents no probability of an encounter for that precise fortnight. We would rather write that than extrapolate a figure.

What does a trip cost, and why do boats fill up so early?

Catalogue offer	Announced price	Basis	Price per person
Whale shark encounter off Arta Plage	25,000 Fdj	per person	25,000 Fdj
Privatised whale shark package	80,000 Fdj	1 to 10 passengers	80,000 Fdj alone, 8,000 Fdj for ten

Price is not the main reason for the pressure on slots. The reason lies elsewhere, and it is written plainly in the decree.

Constraint of the decree	What it changes for booking
Access quota: 4 days per week and 10 boats per day in the area	Total capacity is capped, day by day
Filing fees of 20,000 Fdj paid to the agency by the applicant operator	A fixed cost incurred before any trip
Fee of 2,000 Fdj per passenger, paid in advance by the boat	A cost that rises with the number of places sold
Access rights neither transferable nor exchangeable	A booked slot cannot be resold, so nothing frees up
Compulsory operating authorisation, issued by the agency	A boat without authorisation works outside the framework
Compulsory professional civil liability insurance	A point to check before stepping aboard

Do the calculation on the fee, because it is telling: a boat of ten passengers owes 20,000 Djiboutian francs to the agency for the per-passenger fee alone, which, if the operator passes it on, is the equivalent of 80 % of a place sold at 25,000 francs. That is our calculation, from two published figures, not an announced rate. It explains a simple logic: a boat that leaves half full bears the same fixed costs, so operators commit their slots early and fill them early.

The practical consequence is direct: in high season, the constraint is not the price, it is availability. Book before fixing your land programme, and keep a day’s margin for a postponement.

What can you do outside the regulatory window?

Between 16 March and 14 October, you no longer look for the animal: the area is closed to operating and the probability of an encounter becomes anecdotal. That does not mean the sea loses all interest for seven months.

Outside the window	What you can do
Diving on the gulf’s sites	The classic sites remain accessible: see diving in Djibouti
A day at the islands	Moucha and Maskali are visited all year, with a favourable season from October to April
Coastal trips	Beaches and camps of the northern coast, such as Arta and Ras Korali
General season	The month-by-month detail appears in when to go to Djibouti

If you are coming for the whale shark and your dates fall outside the window, move your dates rather than count on an exemption: the text we consulted provides for none.

Should you aim for the peak or the shoulder?

Your constraint	The period that holds	Why
The encounter is the reason for the trip	November to January	The highest probability, at the cost of concentrated demand
Dates imposed by a flight or leave	Check the window first	Outside 15 October – 15 March, no organised trip is possible
Flexible dates, priority on availability	Late October or February	Slots easier to obtain, privatised formula worthwhile for a group
A group of six to ten	February or late October	The 80,000 Fdj package falls to 8,000 Fdj per person
Sensitivity to comfort	December	The most comfortable conditions of the season
A short stay, a single attempt	November to January, booked early	One day means one chance

The verdict fits in one sentence: the official window is not the best period, it is the permitted period. If you can choose your dates and the encounter matters, come in the peak and book early. If your dates are flexible but your budget is tight, the October and February shoulder remains within the legal framework, with a lower probability — and that is a trade-off we would rather set out for you than settle in your place.