Hey there. Nice to meet you. I’m getting ready for the 2021 Maple Syrup Season and already have maple tree tapping fever. The weather has been strange and unpredictable this winter, which is making me a bit impatient.
I started learning about this hobby in January 2019, when I tapped the silver maple trees in my backyard. That year, I collected 38 gallons of sap, about enough to make an entire gallon of delicious maple syrup.
Later on that year, we had a severe storm. What they called straight-line winds ripped through my neighborhood and ripped 80% of the still green leaves off the trees and broke ~30% of the branches/canopy.
I gave the trees the year off to recover. But we are in the midst of the pandemic, so I’m cooped up AND we have been experiencing some mild temperatures here this winter so far. So I am itching to get out my drill bit and start tapping.
The best time to tap a Maple Tree for sap
The ideal weather to tap a tree and start making Maple syrup is when it dips well below freezing overnight and then up into the 40s during the day.
When the temperature drops below freezing, the sap that is stored in the roots of the Maple trees also freezes up, causing crystals to form. If you’ve ever frozen a beverage in your freezer, you’ll know that frozen water takes up more space and expands.
Then, when the temperature warms up, the sap warms up too, thaws out, and then runs up the tree, which is why we call it a sap run.
All the traditional advice is that you want to wait for that weather pattern to tap your tree–and to expect sap to be collected for about 6-8 weeks after that. The part that has frustrated me, however, is that absent a crystal ball, there is no real way to predict what the weather holds and there are plenty of traps. For example, check out the local weather coming up.
Can you tap maple trees too early?
Yes, you can tap maple trees too early. Your entire season will be about 6-10 weeks long. The best time to tap them is when you expect the temperature to be in the 20s (Fahrenheit) at night and high-30s to mid-40s during the day. If you tap maple trees too early, you will end up with much less sap volume than if you tap at the right time. If you tap too late, your sap will be of lower quality and also potentially lower volume.
Picking the optimal time is challenging and also involves some luck.
In 2019, I started on January 19, when the temperature looked right on paper for 3 of 7 days. But two of those days were surrounded by bitter cold, and the sap didn’t really flow until the third week when the sap yield took off.
This is the weather report in my area over the next week. I’m starting this investigation two full weeks earlier than in 2019, but it is driving me crazy, because, from the looks of it, it is perfect Maple syrup making time, right now.
One last thing before we get started–I’m writing this article somewhat journal-style, meaning that I’ll come back to it every few days (or a week when sap running is slow or life is too hectic) to report back.
Hopefully, that means updates for you–but that also probably means the present, past and future tense of my writing will be a bit jumbled until I get to edit the piece at the end of the year. I appreciate your patience there and hope it isn’t maddening.
January 2, 2021- January 9, 2021
Hard to believe, but it looked like the beginning of the 2021 Maple Syrup Season in Pennsylvania started in the first week of January.
It felt way too early, and I had not tapped my trees yet, but the weather was nearly perfect every day.
If I had tapped my trees, there is no doubt that some of the highest quality sap would have been flowing. But this early in the season, deep freezes can still set in and shut everything down.
Since we only have a precious few weeks to collect sap, we want to identify that time when we will get the best string of days for collecting over a 4-6-week period.
Due to my own predictions that it would get significantly colder again before it got warmer, I sat that week out, hoping for a long season that extended into the early Spring.
January 11, 2021- January 18, 2021
The second week of the year was another perfect week for the 2021 Maple Syrup Season in Pennsylvania.
Take a look at the weather above and see for yourself.
I have to admit that watching a weather report like that and not tapping is a maddening event.
The weather has been in a perfect range–but what kept me out was a lingering doubt that the weather couldn’t/wouldn’t hold up.
Based on the forecast, these days look exactly like my prime sugaring days in 2019. That year, my best days were during swings from the coldest temperature of ~20-25 Fahrenheit to the warmest temperature of at least 39, upwards of 50 degrees.
Ugh! It is excruciating to sit on the sidelines and report-out without tasting that sugar. I need more trees!
The buds started to form on the branches. There was most certainly sap flowing in that tree.
Towards the end of the week, the weather report in the news started to shift to something called a polar vortex. I’m not really sure what that is and not sure I really care other than I hear a tiny voice in my head reassuring me that I was right to wait and not start the season too early.
Time will tell.
The plan at this time was to hold off at least another week, before I officially opened up the 2021 Maple Syrup Season in Pennsylvania at the Ulrich Sugar Shack…and by that I mean 2 maple trees in my suburban yard).
In the meantime, I started to get my gear ready. Do you have your gear ready? Check out this post for the best Maple tree tap kit.
January 18- January 25, 2021
Here is what the weather looked like for the third week in January, 2021:
It definitely got a little colder, but 4-5 days that week would have been solid, and the the other days were cold enough that they would have helped build up the pressure to add to the following days.
At this point in the season, I was starting to think I had messed up and waited too long. Who would have figured January was the best month for sap. Only time will tell.
Sounds counterintuitive, but I’m hoping for a cold blast to shut things down for 1-2 more weeks and a fresh/clear time to start right after.
January 24- January 31, 2021 Weather
Here is the 7-day weather forecast for Sunday to Sunday, the last week in January.
You can see from the hourly forecast (that wavy yellow line at the top) that Sunday night into Monday was still maple sap weather, but then the temperature dropped.
That’s the cold snap I was anticipating. You can see that between the high and low temperatures there was some freezing and thawing, but perhaps not the spread needed to really get the sap flowing.
This weather pattern snapped me out of my malaise. I was just waiting for the weather to cooperate, so I could get out there and tap-away.
January 31 to February 7
That cold front did come through last week–it was not a great week for tapping maple trees. At this point, we are through January (almost). It is possible that Thursday, February 4th will start the Maple Syrup season for me here.
Check out the 7-day weather forecast:
The temperature is too cold Sun- Wednesday, but Thursday, Friday, and Saturday all have great temperature ranges.
Given the fact that we are in the midst of a cold snap, progressing into February with what looks like some warmer temperatures at the end of the week, I’m going to try and watch the weather closely and may get out there on Thursday.
Here is how the week turned out–we got a lot of snow–like two feet of snow. There were at least 2 decent days for maple tree tapping, but based on the weather forecast, I resisted the urge.
Rather than start warming up, we actually are experiencing a cold snap next week. Check it out.
February 9 – 16
As expected, it is cold. very cold. The forecast looked too cold this week to tap my tree.
But, as the week progressed, the weather outlook improved:
As of 2/14 (Happy Valentines Day), here is the 7-day forecast:
Based on that weather, it looks like Sunday might be an okay day–Tuesday, Friday, and the following Sunday should all be great. Looking ahead at a 10-day forecast, the following Monday and Tuesday look great too!
So I tapped my tree on February 14, 2021. Tuesday was a perfect day for collecting sap.
But I did notice that my tap hole was leaking sap. There are two major reasons this happens–either the hole I drilled was wobbly and irregular, and too large for the tap, or the tap was not inserted all the way.
Luckily for me, all I had to do was push the tap in further with a hammer and I was all set.
Despite losing some volume to the ground from my leak…it was a great collection.
Textbook day and the yield proved it.
More than a gallon of sap in one day!
By the way, after boiling down the gallon of sap to a concentrated pint, the kitchen room was filled with humidity. This is the wall of my kitchen above the cabinets…literally dripping with evaporated water :).
That’s why everyone recommends you do the bulk of evaporation outside. But where’s the fun in that?
But then the weather turned colder. Neither Friday nor Sunday ended up being great days for sap.
February 21- 28
Here is the weather forecast for this coming week:
I really wish Sunday 21st was 2-3 degrees warmer…but from the looks of it, should get a stretch of good days ahead, as long as the nights get cold enough.
February 23 and 24th were very good sap-collection days. 2756 g on the 23rd and 4124 on the 24th!
Sorry, I messed up and didn’t take a screenshot of the weather this week. Here’s a different view of the temperature range that I was able to find.
Let me tell you that it was Sooo close to perfect weather…but in reality, it wasn’t.
March 3rd was a pretty good day. 3,347 g of sap (approximately 3.3 L). March 4th was nearly perfect, but it only got down to 32 degrees F before hitting the 40s…and yielded pretty much zero sap.
The rest of the week was either too hot or too cold. Goldilocks would have been bummed.
There was rain during the week as well. One day there was about 600g of sap, but it was tinged yellow/brown. Take a look:
You end up with yellow sap when rainwater drips down the tree trunk and into your sap bucket.
Technically, it’s still good to use.
March 6 – 13
Here is what the weather had in store for the week of March 6-13.
Sunday and Monday seemed pretty close to textbook days, and both yielded sap, but not as much as I had thought or hoped.
Sunday yielded 1301 grams and Monday was 811 grams, which ends up being around 1/2 gallon, combined. Which feels really low, despite nearly perfect weather.
I actually think my taps may be drying up. I looked back and this is the same week the run shut down in 2019.
Buds did break on the tree. Fingers crossed for some more cool weather soon. Hah, did I really just type that?
The weather was mixed this week, much of it too cold for making Maple syrup. Earlier in the week, I checked the bucket and was skunked. Towards the end of the week, I collected 1616 g on Saturday (from Thur-Fri) as the first and only harvest.
The only problem is that it rained a lot and the sap in the bucket had a gross, brown appearance and taste.
Then on Sunday, I harvested a clear, clear, and very sweet 612g on Sunday.
While it looked like Monday would have been a good day for sap, it wasn’t. There was a lot of rain and a lot of rainwater in my bucket. Calling that whole week a zero yield week.
March 30-April 6
When I looked at the week ahead, I was a bit conflicted–after a long winter, the allure of transitioning quickly to a warm Spring seemed too great to resist–but at the same time, I was hoping for a bit more cold evenings to drive up the sap.
Before the week started, I predicted that Thursday and Friday may have been my last two days of the year.
Turned out, I yielded zero sap each of those two days. The only thing I collected was a bunch of rainwater on Wednesday.
Looking at the weather ahead of me–it looks like it will be too warm. Hope it’s a bit cooler where you are and that your lines are running!.